File Extension Database

This is by far the best "searchable" file extension database on the internet today. It is not only a great seach tool, but also a progressive Web App that can be installed onto your desktop or mobile device.

This is a collection of over 3000 File Extensions known today.

Simply type in either the file extension such as .odt or the complete description search criteria. e.g. (.odt) or "open document". If you do not see a file extension listed in our database , please send us a not an will have it added promptly! Thank you!

File Extension Description
0 Image Data Recovery file
0.001 Norton Ghost Span file
0.075 75×75 dpi display font (Ventura Publisher)
0.085 85×85 dpi display font (Ventura Publisher)
0.091 91×91 dpi display font (Ventura Publisher)
0.096 96×96 dpi display font (Ventura Publisher)
0.1 Inno Setup Binary file
0.1 IBM Voice Type Script file
0.113 Iomega Backup file
0.123 Lotus 1-2-3 Spreadsheet file
0.2 Setup Factory 6.0 setup launcher
0.264 Ripped Video Data file
0.301 Fax (Super FAX 2000 – Fax-Mail 96)
0.386 Intel 80386 processor driver (Windows 3.x)
0.411 Sony Mavica Data file
0.669 Music (8 channels) (The 669 Composer)
0.777 7-Zip compressed file archive
0.8 A86 assembler source code file
.__a File Splitter & Joiner Encrypted file
.__b File Splitter & Joiner Encrypted Archive file
._dd Norton Disk Doctor Recovered file
._eml Windows Live Mail Email file
._nws Windows Live Mail Newsgroup Copy file
._p Malicious Software Removal Tool Temporary file
.!bt BitTorrent Incomplete Download file
.!qb qBittorrent Partial Download file
.!ut uTorrent Incomplete Download file
.{pb Corel WordPerfect Document Index file
.#24 Printer data file for 24 pin matrix printer (LocoScript)
.#ib Printer data file (LocoScript)
.#sc Printer data file (LocoScript)
.#st Standard mode printer definitions (LocoScript)
.^^^ Pervasive.SQL Database file
.~$~ Temporary file (1st Reader)
.~ap Old AppExpert project database (Borland C++ 4.5)
.~de Project backup (Borland C++ 4.5)
.~hm HostMonitor TestList Backup file
.~mn Menu backup (Norton Commander)
.$#! Cryptext
.$$$ Temporary file
.$00 Pipe file (DOS)
.$01 Pipe file (DOS)
.$db Temporary file (dBASE IV)
.$ed Editor temporary file (MS C)
.$er GroupWise Database
.$o1 Pipe file (DOS)
.$vm Virtual manager temporary file (Windows 3.x)
.0b Printer font with lineDraw extended character set (PageMaker)
.0xe F-Secure Renamed Virus file
.15u Printer font with PI font set (PageMaker)
.1pe TurboTax Form file
.1ph TurboTax file
.1st Usually README.1ST text
.201$201 Temporary file (1st Reader)
.2d 2d Drawings (VersaCad)
.2da 2 Dimensional Data Array file
.2dl 2d Libraries (VersaCad)
.3d 3d Drawings (VersaCad)
.3da 3D Assembly file
.3dd ArcGlobe Document file
.3dl 3d Libraries (VersaCad)
.3dr 3DMark Benchmark file
.3ds Graphics (3D Studio)
.3dt Database for 3D mind map / concept map (3D Topicscape)
.3dv 3D VRML World
.3fx Effect (CorelChart)
.3g2 3GPP2 file format
.3gp 3GPP Multimedia file
.3gr Data file (Windows Video Grabber)
.3ko NGRAIN Mobilizer
.3me TurboTax Form file
.3mm 3D Movie Maker Movie Project
.3pe TurboTax 2008 Form file
.3t4 Binary file converter to ASCII (Util3)
.4c$ Datafile (4Cast/2)
.4dv 4D View Ultrasound file
.4mp 4-MP3 Database file
.4sw 4dos Swap File
.4th Forth source code file (ForthCMP – LMI Forth)
.5cr Preconfigured drivers for System 5cr and System 5cr Plus
.6cm Music (6 Channel Module) (Triton FastTracker)
.7z 7-Zip archiving format
.8b? Adobe Photoshop Plugin file
.8ba Adobe Photoshop Plugin file
.8bf Adobe Photoshop Plugin file
.8bi Adobe Photoshop Plugin file
.8cm Music (8 Channel Module) (Triton FastTracker)
.8li Photoshop Scripting Plug-in
.8m Printer font with Math 8 extended character set (PageMaker)
.8pbs Adobe Photoshop Macintosh file
.8u Printer font with Roman 8 extended character set (PageMaker)
.a Ada source code file
.a0? ALZip Split Archive file
.a11 Graphics AIIM image file
.a2b A2B Player Playlist
.a3d Amapi 3D Modeling file
.a3m Unpackaged Authorware MacIntosh file
.a3w Unpackaged Authorware Windows file
.a4a Authorware 4.x Library
.a4m Unpackaged Authorware MacIntosh file
.a4p Authorware file packaged without runtime
.a4w Unpackaged Authorware Windows file
.a5w Unpackaged Authorware Windows file
.aa Audible Audio file
.aab Macromedia Authorware Binary
.aac Advanced Audio Coding MPEG-2, MPEG-4
.aam Authorware shocked file
.aax Audible Audiobook file
.ab2 Parson’s Address Book
.ab6 Datafile (ABStat)
.ab8 Datafile (ABStat)
.aba Palm Address Book file
.abc ActionScript Byte Code File
.abd AmBiz Bonus Calculator data file
.abf Adobe Binary Font
.abi ABI CODER Encryption software
.abk Automatic backup file (CorelDRAW)
.abm ImagePals Photo Album Document
.abr Adobe Photoshop brush file
.abs Abstracts (info file)
.abw AbiWord document
.abx WordPerfect Address Book file
.aby AOL file (located in AOL program directory)
.ac3 AC3 Audio File Format
.aca Microsoft Agent Character file
.acb Graphics (ACMB)
.acc Program (DR-DOS – ViewMax) (GEM / resident)
.acd Sonic Foundry Acid music file
.ace Ace Archiver / WinAce compressed file
.acf Microsoft Agent Character file
.aci ACI Development Appraisal
.acl Microsoft Office Auto Correction file
.acm Audio Compression Manager Driver
.acorn ACORN Graphics format
.acs MS Agent Character file
.acs2 AIMP2 Media Player Skin file
.acsm Adobe Content Server Message file
.act Actor source code file
.acv OS/2 Audio Drivers
.ad Screen saver data (AfterDark)
.ada Ada source code file
.adb Ada Package Body
.adc Bitmap graphics (16 colors) (Scanstudio)
.ade Microsoft Access Project
.adf Adapter Description file
.adi Graphics (AutoCAD)
.adl Mca adapter description library (QEMM)
.adm After Dark Screen Saver Module
.adn Add-in (Lotus 1-2-3)
.ado Photoshop Duotone Options
.adp FaxWorks Modem setup file
.adr Address Book
.ads Ada Package Specification
.adt Datafile for cardfile application (HP NewWave)
.adx Document (Archetype Designer)
.adz GZ-Packed Amiga Disk file
.aeh iPer Advanced Embedded Hypertext
.aep Adobe After Effects Project file
.aex PGP Armored Extracted Public Encryption Key
.af2 Flowchart (ABC FlowCharter 2.0)
.aff AnyForm Form file
.afi Truevision bitmap graphics
.afl Font file (for Allways) (Lotus 1-2-3)
.afm Type 1 font metric ASCII data for font installer (ATM – many)
.afs Adobe Type Manager font set
.aft AnyForm template file
.ag Applixware graphics file
.agp Aspen Graphics Pages
.agw Aspen Graphics Windows
.ai Vector graphics (Adobe Illustrator)
.aiff Audio interchange file format
.ain Compressed file archive created by AIN
.aio APL file transfer format file
.air Adobe AIR Installation Package file
.ais Array of Intensity Samples graphics (Xerox)
.aix Datafile for cardfile application (HP NewWave)
.ajp JPEG2000 Digital closed-circuit television (CCTV) security camera video format
.alb JASC Image Commander Album
.albm webAlbum Photo Album
.all Format file for working pages (Always)
.als Alias Image
.alt Menu file (WordPerfect Library)
.alx ActiveX Layout file
.alz ALZip Compressed file
.amf Music (Advanced Module Format)
.amff Amiga Metafile
.amg Compressed file archive created by AMGC
.amp Photoshop Arbitrary Map Settings
.amr Adaptive Multi-Rate ACELP Codec
.amv AMV Video file
.amx After Effects Motion Exchange file
.anc Animation file format (MorphInk)
.ani Animation (Presidio – many)
.anm Animation (Deluxe Paint Animator)
.ann Help Annotations (Windows 3.x)
.ans Ansi graphics (character animation)
.aos Add-On Software (Nokia 9000)
.ap Compressed Amiga file archive created by WHAP
.apc Printer driver (Lotus 1-2-3)
.apd Printer driver (Lotus 1-2-3)
.ape Music format (different players)
.apf Printer driver (Lotus 1-2-3)
.api Adobe Acrobat Plugin file
.apk Android Package file
.apl APL work space format file
.apm ArcPad 6 file
.app Add-in application file (Symphony)
.apr Employee performance review (Employee Appraiser)
.aps MS Visual C++ file
.apx Appexpert database file (Borland C++ 4.5)
.arc Compressed file archive created by ARC (arc602.exe/pk361.exe)
.arf Automatic Response file
.arg AutoCAD Profile Export file
.ari Compressed file archive created by ARI
.arj Compressed file archive created by ARJ (arj241.exe)
.ark Arc file archive created by CP/M port of ARC file archiver
.arl AOL Organizer File
.arr Arrangement (Atari Cubase)
.ars Adobe After Effects Render
.art Graphics (scrapbook) (Art Import)
.arv Arsiv File
.arx Compressed file archive created by ARX
.asa MS Visual InterDev file
.asc Ascii text file
.ascx Microsoft ASP.NET user control file
.asd Autosave file (Word for Windows)
.asf Datafile (STATGRAPHICS)
.ash Assembly language header file (TASM 3.0)
.asi Assembler include file (Turbo C – Borland C++)
.asl Adobe Photoshop Layer file
.asm Assembly source code file
.asmx Microsoft .NET Web Service file
.aso Assembler object (object orientated) file (Turbo Assembler)
.asp Microsoft Active Server Page
.aspx Microsoft ASP.NET file
.asr Ms Automap Route
.asx Microsoft Windows Media Active Stream Redirector file
.asx Microsoft Advanced Streaming Format
.at2 Auto template (Aldus Persuasion 2.0)
.atm Adobe Type Manager data/info
.atn Adobe Photoshop Action file
.atr Lightscape Material Library
.att AT&T Group 4 Bitmap
.aty 3D Topicscape (Exported association type)
.au Sound (audio) file (SUN Microsystems)
.au3 Autoit3 script file
.aud Audio file
.aut AutoIt Script
.aux Auxillary references (TeX/LaTeX)
.ava Publication (Avagio)
.avb Inoculan Anti-Virus virus infected file
.avd Avery Label Pro Data file
.avi Audio Video Interleaved animation file (Video for Windows)
.avr Audio Visual Research file
.avs Animation file
.avx ArcView file
.aw Text file (HP AdvanceWrite)
.awb Lavasoft Ad-aware backup file
.awd AWD MS Fax
.awe Adobe Acrobat Bookmark XML file
.awk Awk script/program
.awm Movie (Animation Works)
.awp Microsoft Fax key viewer
.awr Telsis Digital Audio file
.ax DirectShow Filter
.axd Avery Label Pro Re-Index file
.axe Paradigm C++ Integrated Debugger file
.axg MS Autoroute Trip file
.axl ArcIMS XML Project file
.axs AMX Axcess control system file format
.axt ZenWorks snAPPshot ASCII Application Object template
.axx axxess files used as backups of Inter-Tel databases
.azw Amazon Kindle eBook File
.azz AZZ Cardfile
.b Batch list (APPLAUSE)
.b_w Black and white graphics (atari – mac)
.b&w Black and white graphics (atari – mac)
.b~k backup file
.b00 CD Image Segment file
.b16 PCO Graphic file
.b1n Both mono and color binary screen image (1st Reader)
.b1s Booksmith
.b30 Printer font (JLaser – Cordata) (Ventura Publisher)
.b3d 3D Builder file
.b5i Blindwrite 5 Disk Image file
.b5t Blindwrite 5 Image Information file
.b6i Blindwrite 6 Disk Image file
.b6t Blindwrite 6 Image Information file
.b8 Raw graphics (one byte per pixel) plane two (PicLab)
.backup Ad-Aware Reference file
.bad Bad file (Oracle)
.bag PMMail Mail Index file
.bak Backup file
.bal Music score (Ballade)
.ban Sierra Print Artist Banner
.bar Horizontal bar menu object file (dBASE Application Generator)
.bas Basic source code file
.bat Batch file (DOS)
.bb Database backup (Papyrus)
.bba Settler IV Archive file
.bbl Bibliographic reference (TeX/BibTeX)
.bbm Brush (Deluxe Paint)
.bbs Bulletin Board System announce or text info file
.bc! Bitcomet Incompleted Download file
.bcf ConfigSafe Snapshot index
.bch Batch process object file (dBASE Application Generator)
.bck Backup
.bcm MS Works Communications file
.bcn Business Card Pro Design
.bco Outline font description (Bitstream)
.bcp Borland C++ makefile
.bct Business Card Designer template
.bcw Environment settings (Borland C++ 4.5)
.bde Borland Database Engine
.bdf Bitmap Distribution Format font file (X11)
.bdm AVCHD Index file
.bdmv Blu-ray information file
.bdr Border (MS Publisher)
.bez Outline font description (Bitstream)
.bf2 Bradford 2 font
.bff Binary file format
.bfm Font metrics (unix/Frame)
.bfs Tivoli Storage Manager file
.bfx Fax (BitFax)
.bga Bitmap graphics
.bgi Borland Graphics Interface device driver
.bgl Flight Simulator scenery file
.bgt Quicken 2002 Internet Common File
.bgt Quicken 2002 Internet Common File
.bib Bibliography (ASCII)
.bic Civilization III Scenario
.bid BidMaker 2002 file
.bif Binary Image Format b&w graphics (Image Capture board)
.bik BioCharter Profile backup file
.bin Binary file
.bio OS/2 BIOS
.bip Free-motion capture files for character studio biped
.bit Bitmap Image
.bk Faxbook (JetFax)
.bk! Document backup (WordPerfect for Win)
.bk1 Timed backup file for document window 1 (WordPerfect for Win)
.bk2 Timed backup file for document window 2 (WordPerfect for Win)
.bk3 Timed backup file for document window 3 (WordPerfect for Win)
.bk4 Timed backup file for document window 4 (WordPerfect for Win)
.bk5 Timed backup file for document window 5 (WordPerfect for Win)
.bk6 Timed backup file for document window 6 (WordPerfect for Win)
.bk7 Timed backup file for document window 7 (WordPerfect for Win)
.bk8 Timed backup file for document window 8 (WordPerfect for Win)
.bk9 Timed backup file for document window 9 (WordPerfect for Win)
.bkf Microsoft Backup file
.bkg Background file
.bkp Backup file (Write – TurboVidion DialogDesigner)
.bkw Mirror image of font set (FontEdit)
.blb DreamWorks Resource Archive
.bld Bloadable picture (BASIC)
.blend Blender 3D file
.blf Windows Registry Recovery file
.blg Binary Performance Log File
.blk Temporary file (WordPerfect for Win)
.blob Steam Archive file
.blt Saved AIM Buddy List file
.bm Bitmap graphics
.bmf Corel Image file
.bmi 3ds max Executable
.bmk Help Bookmarks (Windows 3.x)
.bmp Bitmap graphics (PC Paintbrush – many)
.bmx Buzz music file
.bnd Typequick file
.bndl Bundle file
.bnk Adlib instrument bank file
.bob BobDown Downloading Program
.bom MicroSim PCBoard Bill of Materials
.boo Compressed file ASCII archive created by BOO (msbooasm.arc)
.book Adobe FrameMaker Book
.bot Linkbot file
.box Myriad Jukebox file
.bpc Chart (Business Plan Toolkit)
.bpl Delphi Library
.bpt Bitmap fills file (CorelDRAW)
.bqy BrioQuery file
.br Script (Bridge)
.brd Eagle Layout file
.brf Braille ASCII file
.brk Fax (Brooktrout Fax-Mail)
.brn BornoSoft Bangla2000 (a Bengali word processor) File extension
.bro Tree Professional Broadleaf Creator file
.brp Tree Professional Broadleaf Creator image
.brt Micrografx Picture Publisher file
.brx Multimedia browsing index
.bsa Compressed file archive created by BSARC
.bsb MapInfo Sea Chart
.bsc Compressed Apple II file archive created by BINSCII
.bsdl Boundary Scan Description Language
.bsl BSPlayer Configuration file
.bsp Half-life/TFC/CS Map
.bst BibTeX Style file
.bsv Bluespec System Verilog file
.bt! BitTorrent Partial Download file
.btm Batch To Memory batch file (4DOS)
.btn Buttonware file
.bto Baytex Organix! 2001 Language Kit
.btr Btrieve Database file
.btx DB/TextWorks Database Term & Indexes
.bud Quicken Backup
.bug Bugs and Problems
.bun Bundled Audio files
.bup DVD Backup file
.but Button definitions (Buttons!)
.buy Datafile format (movie)
.bv1 Overflow file below insert point in Doc 1 (WordPerfect for Win)
.bv2 Overflow file below insert point in Doc 2 (WordPerfect for Win)
.bv3 Overflow file below insert point in Doc 3 (WordPerfect for Win)
.bv4 Overflow file below insert point in Doc 4 (WordPerfect for Win)
.bv5 Overflow file below insert point in Doc 5 (WordPerfect for Win)
.bv6 Overflow file below insert point in Doc 6 (WordPerfect for Win)
.bv7 Overflow file below insert point in Doc 7 (WordPerfect for Win)
.bv8 Overflow file below insert point in Doc 8 (WordPerfect for Win)
.bv9 Overflow file below insert point in Doc 9 (WordPerfect for Win)
.bwa BlindWrite Disk Image Information file
.bwb Spreadsheet application (Visual Baler)
.bwi Blindread/Blindwrite
.bwr Beware (buglist) (Kermit)
.bws Blindwrite Sub Channel Data File
.bwt Blindread/Blindwrite
.bxx blaxxun Contact
.bz2 Bzip 2 UNIX Compressed file
.c C source code file
.c– Source code (Sphinx C–)
.c++ C++ source code file
.c00 Print file (Ventura Publisher)
.c01 Genesis 2000
.c2d WinOnCD CD Image
.c4d MAXON Cinema 4D File (Graphics)
.c60 Midtronics Battery Management Software
.c86 C source code file (Computer Innovation C86)
.ca Initial cache data for root domain servers (Telnet)
.cab Cabinet File (Microsoft installation archive)
.cac dBASE IV executable when caching on/off (see cachedb.bat)
.cache Cache file (typically Web cache)
.cad Softdesk Drafix CAD File
.cad Document (Drafix Windows CAD)
.cag MS Clip Gallery Catalog file
.cal Calendar file (Windows 3.x)
.calb Coolect Album file (Coolect Album Player)
.cam Casio Camera Graphic
.can Fax (Navigator Fax)
.cap Caption (Ventura Publisher)
.car AtHome Assistant file
.cas Comma-delimited ASCII File
.cat Catalog (dBASE IV)
.cb Clean Boot File (Microsoft)
.cbc Fuzzy logic system (CubiCalc)
.cbf Calendar Builder file
.cbl Cobol source code file
.cbm Compiled bitmap graphics (XLib)
.cbp CentralBuilder Project
.cbr ComicBook Reader File archive (CDisplay image viewer)
.cbt Computer Based Training (many)
.cbz ComicBook Reader File archive (CDisplay image viewer)
.cc C++ source code file
.cca CC:Mail archive file
.ccb Visual Basic Animated Button Configuration
.ccc Bitmap graphics (native format) (Curtain Call)
.ccd CloneCD Related file
.cce Calendar Creator 2 Event file
.ccf Communications configuration file (Symphony)
.cch Chart (CorelChart)
.ccl Communication Command Language file (Intalk)
.cco Btx Graphics file (XBTX)
.cct Macromedia Director Shockwave file
.ccx Corel PrintHouse file
.cda CD Audio Track
.cdb Card database (CardScan)
.cdd ConceptDraw Document file
.cde Honeywell Hybrid Control Designer
.cdf Component Definition file
.cdg Compact Disc Plus Graphics file
.cdi Phillips Compact Disk Interactive format
.cdk Document (Atari Calamus)
.cdl CaseWare Working Papers Document Link
.cdm Media Maker Disk Image file
.cdp Visual Objects Developer file
.cdr Vector graphics (CorelDRAW native format)
.cdt Data (CorelDraw 4.0)
.cdx CorelDraw Compressed Image file
.ce Main.ce (The FarSide Computer Calendar)
.ceb Apabi eBook file
.ceg Bitmap graphics (Tempra Show – Edsun Continuous Edge Graphics)
.cel Graphics (Autodesk Animator – Lumena)
.cf Sendmail Configuration file
.cfb Comptons multimedia file
.cfc Macromedia Coldfusion component extension
.cfg Configuration
.cfl Chart (CorelFLOW)
.cfm ColdFusion Markup Language (Allaire / Adobe / Lucee)
.cfml ColdFusion Markup Language (Allaire / Adobe / Lucee)
.cfn Font data (Atari Calamus)
.cfo C Form Object internal format object file (TCU Turbo C Utilities)
.cfp Quicken Cash Flow Projection file
.cfr Crossfire Replay file
.cga CGA display font (Ventura Publisher)
.cgd Cricket Graph Data file
.cge CCD Astrocamera
.cgi Common Gateway Interface script
.cgm Computer Graphics Metafile vector graphics (A&L – HG – many)
.ch Header file (Clipper 5)
.ch3 Chart (Harvard Graphics 3.0)
.ch4 Presentation (Charisma 4.0)
.chd Font descriptor (FontChameleon)
.chi Document (ChiWriter)
.chk Recovered data (ChkDsk)
.chl Configuration History Log
.chm Compiled HTML
.chn Data (Ethnograph 3)
.cho ChordPro file
.chp Chapter file (Ventura Publisher)
.chr Character set (Turbo C – Turbo Pascal)
.cht Chart (Harvard Graphics 2.0 – SoftCraft Presenter)
.chw Compiled Help Index file
.cid AnalogX Caller ID file
.cif Caltech Intermediate Format graphics
.ciff Canon CIFF
.cil Clip Gallery Download Package
.cit Intergraph Raster File Reference
.cix Database index (TCU Turbo C Utilities)
.ckb Keyboard mapping (Borland C++ 4.5)
.cl Common LISP source code file
.cl3 Easy CD Creator Layout file
.cl4 Easy CD Creator Layout file
.cl5 Easy CD Creator Layout file
.class Java class file
.clb ICQ Contact List
.clg Windows Catalog file
.cli Client Management System Customer file
.clm COLIMO file
.clp Clip art graphics (Quattro Pro)
.clpi Blue-ray Disc Clip Information file
.clr Color binary screen image (1st Reader)
.cls C++ class definition file
.cm Data file (CraftMan)
.cmd Batch file (OS/2)
.cmf FM-music file (Creative Music File)
.cmg CMG file
.cmk Card (Card Shop Plus)
.cml COMAL programming language
.cmm Cmm script (batch) file (CEnvi)
.cmo Virtools Composition file
.cmp Header file for PostScript printer files (CorelDRAW)
.cmq Culturemetrics file
.cms TrialDirector media storage
.cmt Culturemetrics file
.cmv Animation (CorelMove CorelDraw 4.0)
.cmx Corel PhotoPaint Image
.cnc CNC general program data
.cnd ControlDraw file
.cnf Configuration (program – printer setup)
.cnt Helpfile contents
.cnv Data conversion support file (Word for Windows)
.cob Cobol source code file
.cod Datafile (Forecast Plus – MS Multiplan – StatPac Gold)
.col Color palette (Autodesk Animator – many)
.com Command (memory image of executable program) (DOS)
.con Configuration file (Simdir)
.conf Configuration file
.config Configuration file
.cor Protein Structure file
.cpd Script (Complaints Desk)
.cpe MS Fax Cover Sheet
.cpf Fax (The Complete Fax)
.cph Corel Print House image
.cpi Code Page Information file (DOS)
.cpl Control panel file (Windows 3.x)
.cpo Corel Print House file
.cpp C++ source code file
.cpr Cubase Project file
.cps Backup of startup files by Central Point PC Tools autoexec.cps
.cpt Compressed Mac file archive created by COMPACT PRO (
.cpx Control Panel Applet
.cpy Copy Books Data file
.cpz Music text file (COMPOZ)
.cr2 Canon Raw Image file
.crc Total Commander CRC file
.crd Cardfile (Windows 3.x – YourWay)
.crf Cross-reference (MS MASM – Zortech C++)
.crh Links Games Course file
.crp Encrypted database (dBASE IV)
.crs File Conversion Resource (WordPerfect 5.1)
.crt Terminal settings information (Oracle)
.crtr Multi-Ad Creator 7 document
.crtx Microsoft Chart Template file
.cru Compressed file archive created by CRUSH
.crw Canon RAW Image file
.crx Chrome Extension file
.crz Links Games Course file
.cs Visual C# Source file
.csa Comma Deliminated Text
.csf Adobe Colour Settings file
.csg Graph (Statistica/w)
.csh Hamilton Labs C Shell Script file
.csk Claris Works
.csm Precompiled headers (Borland C++ 4.5)
.cso Compressed ISO Image file
.csp PC Emcee Screen Image file (Computer Support Corporation)
.css Cascading Sheet Style file
.cst Macromedia Director Cast file
.csv Comma Separated Values text file format (ASCII)
.ct Continous Tone file
.ctc Control file (PC Installer)
.ctd Cobra Track Dump
.ctf Character code translation file (Symphony)
.ctg Canon Catalog file
.ctl Microsoft Visual Basic Control file
.ctn CADTERNS file
.ctt Messenger contacts file
.ctu CZTU, a gamma-ray analysis program. Need the CTZU.exe file to work
.ctx Course TeXt file (Microsoft online guides)
.cty SimCity City file
.cue MS Cue Cards data
.cuf C Utilities Form definition (TCU Turbo C Utilities)
.cul Windows cursor library (IconForge, ImageForge, ImageForge PRO)
.cur Cursor image file (Windows 3.x)
.cut Bitmap graphics (Dr. Halo)
.cv4 Color file (CodeView)
.cv5 Canvas version 5
.cva ACD Canvas Sequence Set file
.cvb Borland BDE File
.cvd Bitdefender
.cvp Cover page (WinFax)
.cvr WinFax Cover Sheet
.cvs Graphics (Canvas)
.cvt Backup file for CONVERTed database file (dBASE IV)
.cvw Color file (CodeView)
.cwk Claris Works data
.cwz CropWalker file
.cxf Google Picasa Collage file
.cxp Core Media Player XML-based Playlist File
.cxt Macromedia Director Protected Cast file
.cxx C++ source code file (Zortech C++)
.d D programming language source code
.d00 Blaster Master Pro File
.d10 H&R Block Deduction Pro file
.d2s Character file (Diablo 2)
.d3d File Extension for Desktop-3D Notes
.d64 Commodore 64 Emulator Disk Image
.dat Data file in special format or ASCII
.data Sid Tune audio file
.day Journal file
.db Configuration (dBASE IV – dBFast)
.db$ Temperature debug info (Clarion Modula-2)
.db2 Database (dBASE II)
.db3 Database (dBASE III)
.dba Datafile (DataEase)
.dbb ANSYS Database Backup
.dbd Business data (Business Insight)
.dbf Database file (dBASE III/IV – FoxPro – dBFast – DataBoss)
.dbg Symbolic debugging information (MS C/C++)
.dbk Database backup (dBASE IV)
.dbl Windows XP Activation file
.dbm Datafile (DataEase)
.dbo Compiled program (dBASE IV)
.dbs Database in SQL Windows format
.dbt Data Base Text (Clipper)
.dbw Windows file (DataBoss)
.dbx Database
.dca Document Content Architecture text file (IBM DisplayWrite)
.dcf Disk image file
.dcm DCM Module Format
.dcp Data CodePage (OS/2)
.dcr Kodak Proprietary Image Format
.dcs Bitmap graphics (CYMK format) (QuarkXPress)
.dct Database dictionary (Clarion Database Developer)
.dcx FAX Image
.dd Compressed Macintosh file archive created by DISKDOUBLER
.ddat DivX Temporary file
.ddb Bitmap graphics
.ddc DivX Descriptor Description File
.ddf MS Data Definition Language file
.ddi Diskdupe Image file (
.ddp Device Driver Profile file (OS/2)
.de MetaProducts Download Express incompletely downloaded file
.de7 Dance E jay 7 File
.deb Debug script (DOS Debug)
.dec VersaPro Declaration file
.def Assembly header file (Geoworks)
.dem Demonstration
.des Description Text
.dev Device driver
.dfd Data Flow Diagram graphic (Prosa)
.dff Criterion RenderWare 3.x 3D object format
.dfi Outline font description (Digifont)
.dfl Default program settings (Signature)
.dfm Data Flow Diagram model file (Prosa)
.dfs Delight Sound file
.dft Fakt2000 file
.dfv Printing form (Word)
.dfx Drafix file
.dgn Graphics (MicroStation)
.dgr Fax Page (MS Outlook Express)
.dgs Diagnostics
.dh Dependency information for .ph (Geoworks)
.dhp Dr. Halo PIC Format graphics (Dr. Halo II – III)
.dht Datafile (Gauss)
.dhy Adobe Bridge file
.dia Diagraph graphics (Computer Support Corporation)
.dib Bitmap graphics (Device-Independent Bitmap)
.dic Lotus Notes / Domino dictonary file
.dif Database (VisiCalc)
.dig Digilink Format
.dip Graphics
.dir Adobe Director Movie File
.dis DATAIR data import specification file
.divx DivX Encoded Movie file
.diz Description file (Description In Zip)
.dje MattBatt iAM-player
.djv DJVu Scanned file
.djvu DJVu file
.dkb Raytraced graphics (DKBTrace)
.dl Animation (Italian origin)
.dl_ Compressed .dll file in an Install Archive
.dld Data (Lotus 1-2-3)
.dlg Dialog resource script file (MS Windows SDK)
.dll Dynamic Link Library (Windows 3.x – OS/2)
.dls Setup (Norton Disklock)
.dmf Delusion/XTracker digital music file
.dmg Macintosh OS X Disk Image file
.dml Medical Manager DML System Script
.dmo Demo (Derive)
.dmp Dump file (eg. screen or memory)
.dms Compressed Amiga file archive created by DISKMASHER
.dmsk DivX Web Player Temporary file
.dna Desktop DNA data storage file
.dnasym Desktop DNA compiled application script
.dnax Desktop DNA exclusion list (text)
.dne Netica Bayes net file (Norsys Software Corp.)
.dng Adobe Digital Negative fFile
.dnl DigitalWebBook Electronic Book
.do ModelSim Filter Design HDL Coder
.doc Document text file
.docm Open XML Macro-enabled Document file (Microsoft Word 2007 / Word 2010)
.docx Open XML Document text file (Microsoft Office 2007 / Office 2010)
.dog Screen file (Laughing Dog Screen Maker)
.doh Dependency information for .poh (Geoworks)
.dol Nintendo Executable file
.dos External command file (1st Reader)
.dot Line-type definition file (CorelDRAW)
.dotx Microsoft Word 2007 / Word 2010 Template file
.dox Text file (MultiMate 4.0)
.doz Description Out of Zip (VENDINFO)
.dp Calendar file (Daily Planner)
.dpg Nintendo DS MPEG Video File
.dpk Delphi Package file
.dpp Serif DrawPlus Drawing
.dpr Default project- and state-related information (Borland C++)
.dps DivX Player Skin file
.dpt Desktop DNA template
.dpx Digital moving picture exchange format
.dra Map Maker Pro GIS vector layer
.drs Display Resource (WordPerfect for Win)
.drv Device driver eg. for printer
.drw Drawing (various)
.ds Twain Data Source file
.ds4 Vector graphics (Micrografx Designer 4.0)
.dsa DasyTec DASYLab file
.dsb DasyTec DASYLab file
.dsc Discard file (Oracle)
.dsd Database (DataShaper)
.dsf Micrografx Designer
.dsk Project desktop file (Borland C++ – Turbo Pascal)
.dsm Digital sound module (DSI)
.dsn ODBC Data Source file
.dsp Display parameters (Signature)
.dsp2 ReaderX and DragonStar Pro Ltd file extensions
.dsr Driver Resource (WordPerfect for Win)
.dss Screensaver file (DCC)
.dst PC-RDist Distribution file
.dsw Desktop settings (Borland C++ 4.5)
.dsy PC Draft Symbol Library
.dt_ Data fork of a Macintosh file (Mac-ette)
.dta Data file (Turbo Pascal – PC-File – Stata)
.dtd SGML Document Definition file
.dtf Database file (PFS – Q&A)
.dtp Document (Timeworks Publisher3)
.dup Duplicate Backup
.dus Readiris font dictionary
.dvc Data (Lotus 1-2-3)
.dvf DV Studio Camcorder Graphics file
.dvi Device Independent document (TeX)
.dvp Desqview Program Information file (DESQview)
.dvr Windows Media Center Recorded file
.dvr-ms files created by Stream Buffer Engine(SBE)
.dw2 Drawing (DesignCAD for windows)
.dwc Compressed file archive created by DWC (dwc-a501.exe)
.dwd Davka Writer file
.dwf Autodesk WHIP! Drawing Web file
.dwg Drawing (Drafix)
.dwk DADiSP Worksheet File
.dwl Drawing Lock file
.dwt AutoCAD Template/Prototype file
.dwz DVD movieFactory 3
.dx Text file (DEC WPS/DX format – DEC WPS Plus)
.dxf Drawing Interchange File Format vector graphics (AutoCAD)
.dxn Fax (Fujitsu dexNET)
.dxr Adobe Director Movie File
.dyc ICUII Videochat file
.dylib Apple osx extension for lib
.dyn Data (Lotus 1-2-3)
.dz Dzip Compressed file
.e3p CIM-Team E3.series parts file
.e3s CIM-Team E3.series project file format
.e3t CIM-Team E3.series template file
.e3v CIM-Team E3.series viewer project file format
.eap Enterprise Architect Project file
.ear Java Enterprise Application Packaging Unit
.eas Elite Visual Basic API Spy
.ebj Error-checking object file (Geoworks)
.ebo MS Reader Ebook Format
.ebp Pocket PC WindowsCE Project file
.ecf Microsoft Outlook Add-on file
.eco NetManage ECCO file
.ecw Ensoniq Waveset Format
.edb MS Exchange Database
.edl Edit Decision List (management for video/film post production)
.edr Portable energy file – GROMACS 3.3
.eds Ensoniq SQ80 disk image
.edt Default settings (VAX Edt editor)
.eeb Button bar for Equation Editor (WordPerfect for Win)
.efe Ensoniq EPS file
.eft High resolution screen font (ChiWriter)
.efx Fax (Everex EFax)
.ega EGA display font (Ventura Publisher)
.ek5 SonarData Echoview file
.ek6 SonarData Echoview file
.ekm EXP: The Scientific Word Processor Macro
.el Elisp source code file (Emacs lisp)
.elc Compiled ELISP code (Emacs lisp)
.elm MS FrontPage Theme-Pack file
.elt Event list text file (Prosa)
.email Outlook Express Mail Message
.emb Everest Embedded Bank File
.emd ABT Extended Module
.emf Enchanced Metafile graphics
.eml Electronic Mail (Email) Message file
.emp E-Music File Format
.ems PC Tools Enhanced Menu System Config
.emu Terminal emulation data (BITCOM)
.emx Ensuredmail encrypted file/e-mail message
.emz Windows Compressed Enhanced Metafile
.enc Encoded file – UUENCODEd file (Lotus 1-2-3 – uuexe515.exe)
.end Arrow-head definition file (CorelDRAW)
.eng Dictionary engine (Sprint)
.ens EndNote Styles file
.env Enveloper macro (WOPR)
.eot MS WEFT Embedded OpenType file
.epd Publication (Express Publisher)
.epf Encryption Protection (encrypted file format)
.epi Document (Express Publisher)
.epp EditPad Pro Project
.eps Encapsulated PostScript vector graphics (Adobe Illustrator)
.epub Open Electronic Book file
.eqn Equation (WordPerfect for Win)
.erd Entity Relationship Diagram graphic file (Prosa)
.erm Entity Relationship Diagram model file (Prosa)
.err Error log
.esh Extended Shell batch file
.esl MS Visual FoxPro Distributable Support Library
.esp Ventura file
.ess EXP: The Scientific Word Processor Style Sheet
.est MS Streets & Trips 2001 Trip file
.etf Enriched Text file
.eth Document (Ethnograph 3)
.ets eSignal Time and Sales file
.etx Structure Enhanced (setext) text
.ev SonarData Echoview file
.evi SonarData Echoview file
.evl SonarData Echoview file
.evr SonarData Echoview file
.evt Event log
.evy Document (WordPerfect Envoy)
.ewd Document (Express Publisher for Windows)
.ewl EclipseCrossword Word List
.ex Norton Ghost Template File
.ex_ Compressed .EXE File in an Install Archive
.ex3 Device driver (Harvard Graphics 3.0)
.exc Rexx source code file (VM/CMS)
.exd Control Information Cache
.exe Directly executable program (DOS)
.exm Msdos executable, system-manager compliant (HP calculator)
.exp ICQ Saved Chat file
.ext Extension file (Norton Commander)
.ext2fs filesystem driver in the Linux kernel
.exx Intermediate file by MsgPut (IBM LinkWay)
.ezf Fax (Calculus EZ-Fax)
.ezm Text file
.ezp Edify Electronic Workforce Backup Utility
.ezz eZBackup backup file
.f Fortran source code file
.f_i Print IPS file
.f01 Fax (perfectfax)
.f06 Dos screen text font – height 6 pixels (
.f07 Dos screen text font – height 7 pixels (
.f08 Dos screen text font – height 8 pixels (
.f09 Dos screen text font – height 9 pixels (
.f10 Dos screen text font – height 10 pixels (
.f11 Dos screen text font – height 11 pixels (
.f12 Dos screen text font – height 12 pixels (
.f13 Dos screen text font – height 13 pixels (
.f14 Dos screen text font – height 14 pixels (
.f16 Dos screen text font – height 16 pixels (
.f2 FLASH BIOS file
.f2r Linear module (music) (Farandole)
.f3r Blocked module (music) (Farandole)
.f4v MP4 Video file
.f77 Fortran 77 source code file
.f90 Fortran file
.f96 Fax (Frecom FAX96)
.fac Face graphics
.faq Frequently Asked Questions text file
.far Farandoyle Tracker Music Module
.fav MS Outlook Bar Shortcuts
.fax Fax (raster graphics) (most Fax programs)
.fbc FamilyTree Compressed backup file
.fbk Navison Financials Backup
.fc Spell checking dictionary (Harvard Graphics 2.0)
.fcd Virtual CD-ROM
.fcm Binary file patch file (forward compression)(
.fcp FLAMES Checkpoint Restart file (Ternion)
.fcs Flow Cytometry Standard Format
.fcw Campaign Cartographer 2 file
.fd Declaration file (MS Fortran)
.fdb Art Explosion Portfolio Catalog file
.fde FLAMES Dataset Export file (Ternion)
.fdf Adobe Acrobat Forms document
.fdr Final Draft Document file
.fdw Form (F3 Design and Mapping)
.feb Button bar for Figure Editor (WordPerfect for Win)
.fef Steuer2001 file
.fes Fabio Editing Software
.fev FLAMES Environment Variable file (Ternion)
.ff Outline font description (Agfa Compugraphics)
.ffa MS Fast Find file
.fff Fax (defFax)
.ffl MS Fast Find file
.ffo MS Fast Find file
.fft Dca/FFT Final Form Text text file (DisplayWrite)
.ffx Microsoft Fast Find file
.fgd Folder Guard Data
.fh10 Macromedia Freehand 10
.fh3 Vector graphics (Aldus FreeHand 3.x)
.fh4 Vector graphics (Aldus FreeHand 4.x)
.fh5 Freehand 5
.fh6 Freehand 6
.fh7 Freehand 7
.fh8 Macromedia Freehand 8
.fh9 Macromedia Freehand 9
.fi Interface file (MS Fortran)
.fif Fractal Image Format file
.fig REND386/AVRIL Graphic
.fil File template (Application Generator)
.fin Print-formatted text file (Perfect Writer – Scribble – MINCE)
.fio PhotoStyler graphics (filter)
.fit Fits graphics
.fix Patch file
.fky Macro file (FoxPro)
.fla Adobe Flash file
.flac Free Lossless Audio Codec
.flb Format library (Papyrus)
.flc Animation (Autodesk Animator)
.fld Folder (Charisma)
.fle Flea program: outbound file and attachment required by the given mailer environment
.flf Corel Paradox Form
.fli Tex font library (EmTeX)
.flk File Locker Encrypted file
.flm Film Roll (AutoCAD/AutoShade)
.flo Micrografx FlowCharter
.flp Adobe Flash Project file
.flt Asymetrix Graphics Filter Support file
.flv Adobe Flash Video file
.flx Compiled binary (DataFlex)
.fm Spreatsheet (FileMaker Pro)
.fm1 Spreadsheet (Lotus 1-2-3 release 2.x)
.fm3 Device driver (Harvard Graphics 3.0)
.fmb File Manager Button bar (WordPerfect for Win)
.fmf Font or icon file (IBM LinkWay)
.fmg FreeMarkets Graphics Browser
.fmk Makefile (Fortran PowerStation)
.fmo Compiled format file (dBASE IV)
.fmp FileMaker Pro Document
.fmpp FLAMES Model Prototype file for components written in C++ (Ternion)
.fmt Format file (dBASE IV – FoxPro – Clipper 5 – dBFast)
.fmv Frame Vector Metafile
.fmz Form Z Program files (drawing program)
.fn3 Font file (Harvard Graphics 3.0)
.fnt Font file (many)
.fnx Inactive font (Exact)
.fo1 Font file (Borland Turbo C)
.fo2 Font file (Borland Turbo C)
.fol Folder of saved messages (1st Reader)
.fon Dialing directory file (Telix)
.for Fortran source code file
.fot Installed Truetype font (Windows Font Installer)
.fp Configuration file (FoxPro)
.fp3 FileMaker Pro 3.0 and earlier files
.fp4 FileMaker Pro 4.0
.fp5 FileMaker Pro 5.0 and later files
.fpb FLAMES Playback Recorder file (Ternion)
.fpc Catalog (FoxPro)
.fpk JetForm FormFlow file
.fpr FLAMES Prototype file (Ternion)
.fpt Memo (FoxPro)
.fpw Floorplan drawing (FloorPLAN plus for Windows)
.fpx FlashPix Bitmap
.fqy FLAMES FLARE Command file (Ternion)
.fr3 Renamed dBASE III+ form file (dBASE IV)
.frc FLAMES Recorder Output file; FLARE Input file (Ternion)
.frd Files which contain loudspeaker frequency response data
.fre Creative Digital Blaster Digital VCR file
.frf Font (FontMonger)
.frg Uncompiled report file (dBASE IV)
.frl FormFlow file
.frm MySQL Database Format file
.fro Compiled report file (dBASE IV)
.frp Form (PerForm PRO Plus – FormFlow)
.frs Screen Font Resource (WordPerfect for Win)
.frt Report memo (FoxPro)
.frx Report (FoxPro)
.fs F# Source Code file
.fsc FLAMES Scenario file (Ternion)
.fsh EA Sports Game Graphic Editor file
.fsl Form (Paradox for Windows)
.fsm Farandoyle Sample format music
.fsproj Store Firestarter projects used to generate class mapping definitions for Habanero Firestarter
.fst Linkable program (dBFast)
.fsx Data (Lotus 1-2-3)
.fsy Fileware’s Filesync
.ftm Font file (Micrografx)
.ftp Configuration (FTP Software PC/TCP)
.fts Windows Help Full-Text Search Index file
.ftw Family file
.fus Files that store user settings for various FLAMES applications (Ternion)
.fvt Interlock Public Computer Utility
.fw Database (FrameWork)
.fw2 Database (Framework II)
.fw3 Database (Framework III)
.fwp FLAMES Window Viewer project file (Ternion).
.fx DirectX Effects file
.fxd Phonebook (FAXit)
.fxm WinFax/WinFax MiniViewer Fax
.fxo Fax Image Document
.fxp Compiled format (FoxPro)
.fxr WinFax Received Document
.fxs Fax Transmit Format graphics (WinFax)
.g Data chart (APPLAUSE)
.g3 Group 3 Fax document; Group 3 Fax
.g3f Zetafax TIFF file (fine resolution)
.g3n Zetafax TIFF file (normal resolution)
.g8 Raw graphics (one byte per pixel) plane three (PicLab)
.gab Global Address Book file
.gal Corel Multimedia Manager Album
.gam Saved Game file
.gat Gator file
.gb Pagefox Bitmap Image file
.gba Game Boy Advanced ROM
.gbc Game Boy COlor ROM
.gbd Gator Banner file
.gbl Global definitions (VAXTPU editor)
.gbr GIMP Brush file
.gbx Gerber file
.gc1 Lisp source code (Golden Common Lisp 1.1)
.gc3 Lisp source code (Golden Common Lisp 3.1)
.gcd Graphics
.gcf Steam GCF File
.gdb Interbase Database
.gdf Dictionary file (GEOS)
.gdr Bitmap Font file (SymbianOS)
.ged Editor’s native file format (Arts & Letters)
.gem Vector graphics (GEM – Ventura Publisher)
.gen Compiled template (dBASE Application Generator)
.geo Geode (Geoworks)
.gfb Compressed GIF image created by GIFBLAST (gifblast.exe)
.gft Font (NeoPaint)
.gfx Genigraphics Graphics Link Presentation
.gg Google Desktop Gadget file
.gho Symantec Ghost Disk image file
.ghs Lasertank High Scores
.gib Chart (Graph-in-the-Box)
.gid Windows Help index file
.gif Graphics Interchange Format bitmap graphics (CompuShow)
.gig Sound file
.giw Presentation (Graph-in-the-Box for Windows)
.gl Animation (GRASP GRAphical System for Presentation)
.glm Datafile (Glim)
.gls Datafile (Across)
.gly Glossary (MS Word)
.gmd Game Maker file format
.gmf CGM graphics (APPLAUSE)
.gml Geography Markup Language file
.gmp Geomorph tile map (SPX)
.gno Genopro Genealogy Document file
.gnt In MF COBOL a compiled .cbl file
.goc Goc source code file (Geoworks)
.goh Goc header file (Geoworks)
.gp Geode parameter file (Geoworks Glue)
.gp3 CCITT Group 3 file
.gp4 Guitar Pro version 4.06
.gpd VISUAL EPR Input Data for PARAMS.EXE
.gph Graph (Lotus 1-2-3/G)
.gpk Omnigo program package
.gpx GPS eXchange Format
.gr2 Screen driver (Windows 3.x)
.gra Datafile (SigmaPlot)
.grb Ms-DOS Shell Monitor file (MS-DOS 5)
.grd Gradebook Power file
.grf Micrografix Image file
.grl Matlab Graphic Format
.grp Group file (Windows 3.x – Papyrus)
.grx File list (GetRight)
.gry Raw GREY graphics
.gs1 Presentation (GraphShow)
.gsd Vector graphics (Professional Draw)
.gsm Raw GSM 6.10 Audio Stream
.gsp Geometer’s Sketchpad Material file
.gsw Worksheet (GraphShow)
.gtp Gnome Desktop Theme file
.gts Genome Software Tempo Alarm Clock
.gup Data (PopMail)
.gwi Groupwise File
.gwp Greetings WorkShop file
.gxd General CADD Pro file
.gxl Graphics library (Genus)
.gxt GTA2 Game file
.gym Sega Genesis Music Logged Format
.gz Compressed file archive created by GZIP (GNU zip)
.gzip Compressed file archive created by GZIP (GNU zip)
.heic High Efficiency Image Container (HEIC) Used in Apple iOS 11 and macOS High Sierra in 2017
.heif HEIF borrows technology from the High Efficiency Video Compression (HEVC) codec, also known as h.265
.hevc High Efficiency Video Compression (HEVC) codec, also known as h.265
.h Header file
.h– Header file (Sphinx C–)
.h! On-line help file (Flambeaux Help! Display Engine)
.h++ Header file (C++)
.ha Compressed file archive created by HA (
.ham Image file
.hap Compressed file archive created by HAP (
.hbk Handbook (Mathcad)
.hbs eBerry Transparent Animation – compressed bitmap files
.hcr IBM HCD/HCM Production Configuration
.hdf Hierarchical Data File graphics (SDSC Image Tools)
.hdl Alternate download file listing (Procomm Plus)
.hdp HD Photo File
.hdr InstallShield Setup header
.hds Windows Digital Right Management file
.hdw Vector graphics (Harvard Draw)
.hdx Help index (AutoCAD – Zortech C++)
.hed HighEdit document
.hex Hex dump
.hfi Hp Font Info file (GEM)
.hfx HotFax file
.hgl Hp Graphics Language graphics
.hh C++ header file
.hhc Table of Contents file
.hhh Precompiled header file (Power C)
.hhk Help Workshop Index file
.hhp Help information for remote users (Procomm Plus)
.hht MS Messenger file
.hin Molecule (HyperChem)
.his Insight II Dynamics Trajectory History file
.hlb Help library (VAX)
.hlp Help information
.hlz Multi-Edit Packed Help file
.hm3 Help & Manual 3 project Format
.hmm Alternate Mail Read option menu (Procomm Plus)
.hnc CNC program files Heidenhain (?) dialog
.hof Hall Of Fame (game scores)
.hp8 Ascii text HP Roman8 character set (NewWave Write)
.hpf Hp LaserJet fonts (PageMaker)
.hpg HPGL plotter file vector graphics (AutoCad – Harvard Graphics)
.hpi Font information file (GEM)
.hpj Help project (MS Help Compiler)
.hpk Compressed file archive created by HPACK (
.hpm Emm text (HP NewWave)
.hpp C++ header file (Zortech C++)
.hqx Compressed Macintosh ASCII archive created by BINHEX (
.hrf Graphics (Hitachi Raster Format)
.hrm Alternate Main menu for limited/normal users (Procomm Plus)
.hs2 Monochrome image (Postering)
.hsi Handmade Software Inc. graphics – almost JPEG (Image Alchemy)
.hst Yahoo Messenger History file
.hta Hypertext application
.htc HTML Component (mechanism for implementing Dynamic HTML in script)
.htf WebBase File
.hti WebBase File
.htm HyperText Markup Language document
.html HyperText Markup Language document
.htr Motion Analysis Software Skeletal file
.htt Hypertext template
.htx Hypertext file
.hus Husqvarna Designer I Embroidery Machine Format
.hwd Presentation (Hollywood)
.hxm Alternate Protocol Selection menu for all users (Procomm Plus)
.hxx C++ header file
.hy1 Hyphenation algorithms (Ventura Publisher)
.hy2 Hyphenation algorithms (Ventura Publisher)
.hyc Data (WordPerfect)
.hyd Hyphenation dictionary (WordPerfect for Win)
.hyp Compressed file archive created by HYPER (
.hyt VFSMOD Project output file
.i Intermediate file (Borland C++ 4.5)
.iaf MS Outlook 97 and 2000 e-mail account settings
.iax Bitmap graphics (IBM Image Access eXecutive)
.ibd Installer Dialog Resource file
.ibm Compressed file archive created by ARCHDOS (Internal IBM only)
.ibp Isobuster Image file
.ibq Isobuster Managed Image file
.ica Bitmap graphics (Image Object Content Architecture)
.icb Bitmap graphics
.icc Kodak Printer Image
.icd IronCAD 2D CAD file
.icl Icon library (ActivIcons, IconForge, ImageForge, ImageForge PRO)
.icm Image Color Matching Profile file
.icn Icon source code file
.ico Icon (Windows 3.x)
.ics iCalendar Calendar file
.id Disk identification file
.id2 Windows Live Messenger Emoticon file
.idb Database Used by Disassembler
.ide Project (Borland C++ 4.5)
.idf ARTiSAN Real-time Studio ID file
.idl MS Visual C++ Interface Definition file
.idw Vector graphics (IntelliDraw)
.idx Index (many – FoxPro)
.ies Photometric file data
.ifd Form (JetForm Design)
.iff Interchange File Format bitmap graphics/sound (Amiga)
.ifo Saved graphic objects (ImageForge PRO)
.ifp Script (KnowledgeMan)
.ifs Fractal image compressed file (Yuvpak)
.igr Intergraph SmartSketch Drawing
.igs IGES-Format
.igx iGrafx Process
.iif QuickBooks for Windows Interchange file
.ilb Data (Scream Tracker)
.ilk Outline of program’s format (MS ILink incremental linker)
.im30 Sun Raster image file
.im8 Sun raster graphics
.ima Mirage vector graphics (EGO, Chart, Autumn)
.imb IncrediMail file
.imc IncrediMail file
.imd Caseware IDEA (GIS data file)
.imf ImageForge/IconForge saved filtered brushes(IconForge, ImageForge, ImageForge PRO)
.img Bitmap graphics (Ventura Publisher – GEM Paint)
.imm IncrediMail Trash
.imn IncrediMail Notifier
.imp Spreadsheet (Lotus Improv)
.imq Image presentation (ImageQ)
.ims Incredimail Graphic
.imv Yahoo Instant Messenger IMVironment
.imw Imageware Surfacer 3D CAD Surface Geometry
.imz Compressed floppy image
.in$ Installation file (HP NewWave)
.in3 Input device driver (Harvard Graphics 3.0)
.inb Test script (Vermont HighTest)
.inc Include file (several programming languages)
.ind Index (dBASE IV)
.indd Adobe InDesign file format
.inf Type 1 LaserJet font information file (soft font installers)
.ini Initialization file
.ink Pantone reference fills file (CorelDRAW)
.inl MS Visual C++ Inline Function file
.inp GIS Software Text Input file
.ins Data (WordPerfect)
.int Borland Interface Units
.inv Rogue Spear Inventory file
.inx Foxpro Index (Foxbase)
.io Compressed file archive created by CPIO
.iob 3d graphics database in TDDD format
.ioc Organizational chart (Instant ORGcharting!)
.ion 4dos descript.ion file (file descriptions)
.ipa iPod/iPhone Application file
.ipd BlackBerry Backup file
.ipg Mindjongg Format
.ipj Impatica OnCue Project file
.ipl Pantone Spot reference palette file (CorelDRAW)
.ipp Help & Manual Proprietary Image
.ips Game Patch file
.ipsw IPod/IPad/IPhone Software file
.ipx IPIX AV file
.ipz ICQ Skin Plus
.iri IR Image file
.irs Resource (WordPerfect)
.isd Spelling Checker dictionary (RapidFile)
.ish Compressed file archive created by ISH
.isk Command file
.iso Easy CD Creator Disc Image
.isr MS Streets & Trips Route file
.iss InstallShield Response file
.ist Digitrakker Instrument File (n-FaCToR)
.isu InstallShield Uninstall Script
.isz An extension on .ISO that allows compression and splitting of an archive
.it Settings (intalk)
.itc2 iTunes Album Data file
.itdb iTunes Database file
.itf Interface file (JPI TopSpeed Pascal)
.ith InTether technology secured file
.itl Music Library file
.iv OpenInventor files (the successor to Inventor)
.iva security video data file
.ivt MS Infoviewer Title
.iw Presentation flowchart (IconAuthor – HSC InterActive)
.iwa Text file (IBM Writing Assistant)
.iwd Call of Duty Game Data file
.iwp Text file (Wang)
.izt Izl binary token file (IZL)
.j01 File Extension from ADP Payroll Company
.jad Java Application Descriptor extension (for installing MIDlets)
.jar Java archive file
.jas Graphics
.jav Java source code file
.java Java source code file
.jbc Jam Byte-Code Hex file
.jbd Datafile (SigmaScan)
.jbf Paint Shop Pro browser file
.jbk Juno Backup file
.jbr Jasc Paint Shop Pro Brush
.jbx Project file (Project Scheduler 4)
.jdt Accelio Capture Classic Filler
.jef Janome NH10000 Sewing Machine file
.jet Fax (Hybrid JetFax)
.jff Bitmap graphics (JPEG File Interchange Format)
.jfif JPEG image
.jfx J2 Fax File
.jhtml Dynamo Server Page
.jif JPEG/JIFF Image
.jmx JMeter file
.jnb Sigma Plot Workbook file
.jnl Ingres Journal file
.jnlp Java Web Start file
.jnt Windows Journal Note file
.job Job file
.jor Journal file SQL
.jou Journal backup (VAX Edt editor)
.jp2 JPEG 2000 file
.jpc Graphics (Japan PIC)
.jpeg JPEG image
.jpf JPEG 2000 file
.jpg Bitmap graphics (Joint Photography Experts Group)
.jps Stereo Image
.jpx JBuilder Project file
.js Microsoft Scripting Language “JScript” file extension
.jsd eFAX Jet Suite Document
.jse JScript Encoded Script file
.jsf Fireworks Batch Script file
.jsh Henter-Joyce, Inc. Jaws Script Header file
.json JavaScript Object Notation file
.jsp Java Server page
.jtf Fax (Hayes JT Fax)
.jtp Jetform file
.jup (New Planet Software) Code Crusader user’s project preferences file
.jw Text document (JustWrite)
.jwl Library (JustWrite)
.jwp Easy CD Creator Label file
.jxr JPEG XR file
.jzz Spreadsheet (Jazz)
.kar Midi file with karaoke word track
.kau Sassafras KeyAudit Audit file
.kb Keyboard script (Borland C++ 4.5)
.kbd Keyboard mapping (LocoScript – Signature – Procomm Plus)
.kbm Keyboard mapping (Reflection 4.0)
.kcl Lisp source code (Kyoto Common Lisp)
.kcp Keychamp file
.kdc Kaspersky Virus Database file
.keo Older, outdated Print Shop extension
.ket Older, outdated Print Shop extension
.kex Macro (KEDIT)
.kext Mac OS X Kernel Extension
.key Datafile (Forecast Pro)
.kgb KGB Archive file
.kit Raven Toolkit file
.kix KixTart Script
.kma Kodak Memory Book file
.kml Keyhole Markup Language file
.kmp Korg Trinity KeyMaP file
.kmx Kaufman Mmail Warrior Mail Folder
.kmz Google Earth Map Location file
.kos MicroType Pro Document
.kp2 Kruptos Encrypted file
.kpl Kazaa Playlist
.kpp Toolpad (SmartPad)
.kps Ibm KIPS bitmap graphics
.kqb Knowledge Question Base file
.kqe W32/Spybot.KQE Worm virus
.kqp Konica Quality Picture
.krz Kurzweil 2000 Sample
.ksd Native Instruments Audio Patch file
.ktk Kutoka’s Mia
.kwi Navigation Data file
.kwm WebMoney Private Key file
.kyb Keyboard mapping (FTP Software PC/TCP)
.l Lex source code file
.l01 ARC Digitized Raster Graphics
.lab Datafile (NCSS – SOLO)
.lang Skype Language file
.lat Crossword Express Lattice file
.latex LaTeX typesetting system
.lay Word chart layout (APPLAUSE)
.lbg Label generator data (dBASE IV)
.lbl Label (dBASE IV – Clipper 5 – dBFast)
.lbm Bitmap graphics (DeluxePaint)
.lbo Compiled label (dBASE IV)
.lbr Compressed file archive created by LU (lue220.arc)
.lbt Label memo (FoxPro)
.lbx Label (FoxPro)
.lcf Linker Control File (Norton Guides compiler)
.lck Lockfile (Paradox)
.lcl Data (FTP Software PC/TCP)
.lcn Lection (WordPerfect)
.lcs Datafile (ACT! History Files)
.lcw Spreadsheet (Lucid 3-D)
.ld Long Distance codes file (Telix)
.ld1 Overlay file (dBASE)
.ldb Data (MS Access)
.ldf Library definition file (Geoworks Glue)
.ldif LDAP Data Interchange Format
.leg Legacy Graphic Format
.les Lesson (check *.cbt)
.let Letter
.lev Level file (NetHack 3.x)
.lex Lexicon (dictionary) (many)
.lfa LifeForm file
.lft Laser printer font (ChiWriter)
.lg Logo procedure definitions (LSRHS Logo)
.lgc Program Use Log file
.lgo Logo for header and footer (SuperFax)
.lgx Gerber file
.lha Compressed file archive created by LHA/LHARC (lha255b.exe)
.lhw Compressed Amiga file archive created by LHWARP
.lib Library file (several programming languages)
.lic License file (Shareware)
.lid Kodak Gallery Album file
.lif Logical Interchange Format data file (Hewlett-Packard)
.lim Compressed file archive created by LIMIT (
.lin Line types (AutoCAD)
.lis Listing (VAX)
.lit MS Reader eBook file
.lix Extend Simulation Library file
.lj Text file for HP LJ II printer
.lko MS Outlook Express Linked Object
.ll3 Laplink III related file (document) (LapLink III)
.lmp Lump File
.lmt Nokia PC Suite Log file
.lnd 3D Landscape Data
.lng Adobe Acrobat Language Plugin file
.lnk Windows Shortcut file
.loc MicroSim PCBoard Component Locations Report
.lod Load file
.log Log file
.lok Encrypted and compressed archive format (FileWrangler, SecurDesk!, ZipWrangler)
.lpc Printer driver (TEKO)
.lpd Helix Nuts and Bolts File
.lpf Lytec’s Direct Electronic Medical Claims ClaimsDirect
.lpi Live Pictures
.lpk Licensed ActiveX Control for Internet Explorer.
.lrf Linker response file (MS C/C++)
.lrs Language Resource File (WordPerfect for Win)
.lse Nokia Audio Manager
.lsf Streaming Audio/Video file
.lsl Lotus Script Library
.lsp Lisp source code file (Xlisp)
.lss Spreadsheet (Legato)
.lst Keyboard macro (1st Reader)
.lt2 e frontier Poser file
.ltm Form (Lotus Forms)
.ltr Letter
.lua Lua Source Code file
.lvl Game Level file
.lvp Lucent Voice Player
.lwa LightWorks Archive Material/Scene file
.lwd Text document (LotusWorks)
.lwo NewTek Lightwave Object
.lwp IBM Word Pro / Lotus Word Pro 96/97 document file
.lwz MS Linguistically Enhanced Sound file
.lx Lexico – files with source code
.lyr DataCAD Layer file
.lzd Difference file for binaries (Ldiff 1.20)
.lzh Compressed file archive created by LHA/LHARC (lha255b.exe)
.lzs Compressed file archive created by LARC (
.lzw Compressed Amiga file archive created by LHWARP
.lzx Compressed file
.m Function (program) (Matlab)
.m_u Backup of boot sector, FAT and boot dir (MazeGold)
.m11 Text file (MASS11)
.m1v MPEG-1 Video file
.m2p MPEG-2 Program Stream Format file
.m2ts BDAV MPEG-2 file
.m2v MPEG-2 Video Only file
.m3 Modula 3 source code file
.m3d 3D animation macro
.m3u Music Playlist (Winamp)
.m4 M4 preprocessor file (unix)
.m4a MPEG-4 Audio Layer
.m4b MPEG-4 Audio Book file
.m4p MPEG-4 Encoded Audio file
.m4r iPhone Ringtone file
.m4v Apple Video file
.ma3 Macro (Harvard Graphics 3.0)
.mac Bitmap graphics (Macintosh MacPaint)
.mad MS Access Module Shortcut
.maff Mozilla Archive Format file
.mag Woody Lynn’s MAG graphics format (MPS Magro Paint System)
.mai Mail (VAX)
.mak Makefile
.man Command manual
.map Color palette
.mar Mozilla Archive
.mas Smartmaster set (Freelance Graphics)
.mat Data file (Matlab)
.max Max source code file
.mb Memo field values for database (Paradox)
.mbf MS Money Backup file
.mbk Multiple index file backup (dBASE IV)
.mbx Mailbox (Eudora/Zerberus)
.mcc Configuration file (Mathcad)
.mcd Document (Mathcad)
.mcf Mathcad font
.mci Mci command script (Media Control Interface)
.mcp Application script (Capsule)
.mcr DataCAD Keyboard macro file
.mcw Text file (MacWrite II)
.mcx Graphic file
.md Compressed file archive created by MDCD (mdcd10.arc)
.md5 MD5 Checksum file
.mda Data (MS Access)
.mdb Database (MS Access)
.mde Microsoft Access MDE database
.mdf Accelio Capture Classic (JetForm) Filler
.mdi Microsoft Office 2003 imaging format
.mdk Keyboard Map file
.mdl Model (3D Design Plus)
.mdm Modem definition (TELIX)
.mdmp Microsoft Windows XP Trouble Report
.mdr FaxTalk Modem Doctor Modem Report file
.mdt Data table (MS ILink incremental linker)
.mdx Multiple index file (dBASE IV)
.mdz MS Access Wizard Template
.me Usually ASCII text file READ.ME
.meb Macro Editor bottom overflow file (WordPerfect Library)
.med Macro Editor delete save (WordPerfect Library)
.mem Macro Editor macro (WordPerfect Library)
.meq Macro Editor print queue file (WordPerfect Library)
.mer Macro Editor resident area (WordPerfect Library) (vakioalue)
.mes Macro Editor work space file (WordPerfect Library)
.met Document (Omnipage Pro)
.meu Menu group (DOS Shell)
.mex Mex file (executable command) (Matlab)
.mf Metafont text file
.mfx ImageMAKER Fax Viewer folder file
.mgf Font (Micrografx)
.mgi Modular Gateway Interface
.mgp MagicPoint Presentation file
.mhp MS Home Publishing Project
.mht MS MHTML Document
.mia MusicIndiaOnline player music file
.mib Snmp MIB file
.mic Microsoft Image Composer file
.mid Standard MIDI file (music synthetizers)
.mif Maker Interchange Format (FrameMaker)
.mii Datafile (MicroStat-II)
.mim MIME file
.mio Multimedia Interactive Object
.mip Paint Shop Pro Multiple Image Print file
.mis Delta Force Land Warrior Mission
.mix Object file (Power C)
.mk Makefile
.mkd Pervasive Btrieve files
.mke Makefile (MS Windows SDK)
.mki Japanese graphics MAKIchan format (MagView 0.5)
.mks Data (TACT)
.ml3 Project (Milestones 3.x)
.mlb Macro library file (Symphony)
.mlm Novel Groupwise e-mail file
.mm Text file (MultiMate Advantage II)
.mmc Media Catalog
.mmd Peristudio/PeriProducer file
.mmf Mail message file (MS Mail)
.mml Mail Meta Language
.mmm Movie (RIFF RMMP format) (MacroMind Director 3.x)
.mmo Memo writer file (RapidFile)
.mmp Output video format from Bravado board
.mmx Command & Conquer Red Alert 2 Map file
.mmz MusicMatch Theme file
.mnd Menu source (AutoCAD Menu Compiler)
.mng Map (DeLorme Map’n’Go)
.mnt Menu memo (FoxPro)
.mnu Advanced macro (HP NewWave)
.mnx Compiled menu (AutoCAD)
.mny Account book (MS Money)
.mob Device definition (PEN Windows)
.mod Modula-2 source code file (Clarion Modula-2)
.mol MDL Molfile
.mon Monitor description (ReadMail)
.mov QuickTime Video Clip
.mp2 Mpeg audio file (xing)
.mp3 mp3PRO Audio file
.mp4 MPEG-4 Video File
.mpa MPEG Audio Stream, Layer I, II or III
.mpc Calender file (MS Project)
.mpd MS Project database file
.mpe MPEG Movie Clip
.mpeg MPEG Movie Clip
.mpf MS Design Gallery
.mpg MPEG-1 animation
.mpl Playlist Data file
.mpls Blu-ray Information file
.mpm Mathplan macro (WordPerfect Library)
.mpp Project file (MS Project)
.mpq Blizzard Game Data file
.mpr Generated program (FoxPro)
.mps Multimedia File
.mpt Bitmap graphics (Multipage TIFF)
.mpv View file (MS Project)
.mpw MosASCII Project Workspace file
.mpx Compiled menu program (FoxPro)
.mrb Multiple Resolution Bitmap graphics (MS C/C++)
.mrc MIRC Script file
.mrk Informative Graphics markup file
.mrs Macro Resource file (WordPerfect for Win)
.msc MS C makefile
.msd MS Diagnostic Utility Report
.msf Multiple Sequence file
.msg Message
.msi Windows Installer file
.msm MultiSIM Circuit Diagram
.msn MSN Content Plus file
.mso Math Script Object file
.msp Bitmap graphics (Microsoft Paint)
.mspx XML based Web Page
.mss Manuscript text file (Perfect Writer – Scribble – MINCE – Jove)
.mst ChemFinder Chemical Structure Index
.msu Windows Update file
.msv Sony Memory Stick Format
.msw Text file (MS Word)
.mswmm Windows Movie Maker Project
.msx Compressed CP/M file archive created by MSX
.mtd Digital Sheet Music
.mth Math file (Derive)
.mtm Multitracker Module music
.mts AVCHD Video file
.mtv MTV Music Generator
.mtw Datafile (Minitab)
.mtx Temporary File often used by a browser or TWAIN device
.mu Menu (Quattro Pro)
.mu3 Myriad Music file (packed sounds & digital tracks)
.muf ProtoMuck Multi User Forth Program
.mul Ultima Online Game
.mus MusicTime Sound file
.mvb Database
.mvc Music Collector Collection Manager file
.mvd MicroDVD (DVD movie file)
.mvf Stop frame file (AutoCAD AutoFlix)
.mvi Movie command file (AutoCAD AutoFlix)
.mvw Log file (Saber LAN)
.mwf Animation (ProMotion)
.mwp Lotus Wordpro 97 Smartmaster file
.mws Maple Worksheet File
.mwv MovieWorks file
.mxd GIS Project file
.mxe Macro Express
.mxf Material eXchange Format for the interchange of audio-visual
.mxl Moxcel Spreadsheet File
.mxm MS Project/Outlook Team Assign Task
.mxp Macromedia Extension Manager
.mxt Data (MS C)
.myp Presentation (MM Make Your Point)
.myr Myriad Music file
.mys Myst Saved Game
.myt Myriad Tutorial file
.mzp Maxscript Compressed File
.na2 Netscape Mail file
.nam MS Office Name file
.nap Naplps file (VideoShow) (EnerGraphics)
.nav MSN Application Extension
.nb Text file (Nota Bene)
.nbf Backup Now Backup file
.nbu Nokia PC Suite Backup file
.nc Graphics (netcdf)
.ncb MS Developer Studio file
.ncc Cnc (Computer Numeric Control) control file (CamView 3D)
.ncd Nero CoverDesigner Document file
.ncf Lotus Notes Internal Clipboard
.nch Outlook Express folder file
.nd5 NDS Renamed file
.ndb Network database (Intellicom – Compex)
.nde Video format – various manufactures of surveillance camera systems
.ndf NeoPlanet Browser File
.ndk Lotus Notes(containing the files related to workspace)
.ndx Index file (dBASE II – III – IV – dBFast)
.neb Nortec H.E.L.P.
.ned MSN Application Extension
.nef Nikon’s RAW format for digital cameras (Nikon Electronic Format)
.neo Raster graphics (Atari Neochrome)
.nes Nintendo Entertainment System ROM Image
.net Network configuration/info file
.new New info
.nfo Info file
.ng Online documentation database (Norton Guide)
.ngf Enterasys Networks NetSight generated format file
.ngg Nokia Group Graphics
.nh NetHack file
.nib Adobe AIR file
.nif NetImmerse File Format
.njb Photo Index file
.nlm Netware Loadable Module
.nls Code Page National Language Support
.nlx Form (FormWorx 3.0)
.nmd SwordSearcher file
.nmi SwordSearcher file
.nmo Virtools Behavioral Objects
.nms Numega Softice’s Loader file
.nnb newnovelist Story Outline
.nob VersaPro Word Exchange file
.nol Nokia Operator Logo
.not Acrobat Spelling file
.now Text file
.np Project schedule (Nokia Planner) (Visual Planner 3.x)
.npa ReliaSoft Weibull++ 6
.npf Backup Now Image file
.npi Source for DGEN.EXE intepreter (dBASE Application Generator)
.nra Nero Audio-CD Compilation
.nrb Nero CD-ROM Boot Compilation
.nrg Norton Registration Entries
.nri Nero ISO CD-ROM compilation
.nrl iManage file
.nrw Nero WMA Compilation file
.nsc Noder file (Polish)
.nsf Lotus Notes / Domino database
.nsi Nullsoft Install System Script
.nst Music (NoiseTracker)
.nt Startup files (Windows NT)
.ntf Lotus Notes / Domino template file
.nth Nokia Theme file
.ntp Neato CD Labels
.ntr Executable ASCII text file (strip header and rename) (
.nts Tutorial (Norton)
.ntx Index (Clipper 5)
.ntz InVircible Directory Integrity Information
.nu4 Norton Utilities Root File (DLL) Symantec Corporation
.nuf Message for new users on their 1st call (Procomm Plus)
.numbers iWork Numbers Spreadsheet file
.nup Program Component Update files
.nvc Nero Vision Project file
.nvm AOLpress Help file
.nwc Noteworthy Composer song file
.nwr New World Report Aegis/MSP Law Enforcement Records (New World Systems)
.nws Info text file (latest news) (ASCII)
.nwt New World Text Aegis/MSP Law Enforcement Records (New World Systems)
.nxt Sound (NeXT format)
.nzb NewsBin Index file
.o Object file (unix – Atari – GCC)
.o$$ Outfile (Sprint)
.oaz Fax (NetFax Manager)
.ob Object cut/paste file (IBM LinkWay)
.obd MS Office Binder
.obj Object code (Intel Recolatable Object Module)
.obr Object browser data file (Borland C++)
.obs Script (ObjectScript)
.obv Visual interface (ObjectScript)
.oca Control Typelib Cache
.ocf Object Craft File (Object Craft)
.ocm AOL Advertising Control files
.ocp Advanced Art Studio
.ocr Incoming fax transcribed to text (FAXGrapper)
.oct Radiance Octree Format
.ocx OLE ActiveX custom control
.odf Open Document Interchange
.odg OpenDocument Graphic file
.odl Type library source (Visual C++)
.odp OpenOffice Presentation file
.ods OpenOffice Spreadsheet file
.odt OpenOffice OpenDocument text document
.oeb Outlook Express Backup Wizard
.oem TextSetup OEM file
.ofc Open Financial Connectivity file
.ofd Form definition (ObjectView)
.off Object File Format vector graphics
.ofm Adobe font
.oft MS Outlook Item Template
.ofx Olicom Fax
.ogg Ogg Vorbis Codec Compressed WAV file
.ogm Ogg Vorbis Compressed Video file
.ogv Video Container file
.okt Music (Oktalizer)
.olb Object library (VAX)
.old Backup file
.ole Object Linking and Embedding Object
.oli Text file (Olivetti)
.oma OpenMG Music file
.omf Open Media file
.omg OpenMG Jukebox
.oms Briggs Softworks Order Maven
.ond Lotus Notes-related file
.one OneNote Document File
.ont Bible file
.oom Swap file (Shroom)
.opd Omnipage file
.opf Flip Album file
.opl Psion Organiser Programming Language Source file
.opn Active options (Exact)
.ops Microsoft Office profile settings file
.opt Optimize support file (QEMM)
.opw Organization chart (Org Plus for Windows)
.opx Inactive options (Exact)
.or2 Lotus Organizer 2 file
.or3 Lotus Organizer 97 file
.or4 Lotus Organizer file
.or5 Lotus Organizer file
.ora Parameter file (Oracle)
.org Calendar file (Lotus Organizer)
.osd Open Software Description file
.oss MS Office Saved Search
.ost Microsoft Outlook Offline file
.otf Open Type Format
.otl Outline font description (Z-Soft Type Foundry)
.otx Text file (Olivetti Olitext Plus)
.out Output file
.ov1 Overlay file (part of program to be loaded when needed)
.ov2 Overlay file (part of program to be loaded when needed)
.ovd Datafile (ObjectVision)
.ovl Overlay file (part of program to be loaded when needed)
.ovr Overlay file (part of program to be loaded when needed)
.ovw Cool Edit Pro Overviewfile
.ows Web Studio 2 Project file
.oxt Open Office Extension file
.p Pascal source code file
.p16 Music (16 channels) (ProTracker Studio 16)
.p22 Patch file (Patch22)
.p65 Adobe Pagemaker v6.5
.p7m PKCS #7 MIME Message
.pa Print Artist
.pa1 Worktable (PageAhead)
.pab Microsoft Outlook personal address book
.pac Stad Image (graphics ?)
.pack Pack 2000 Compressed file
.pad Keypad definition (Telemate)
.paf PARIS audio format
.pages Pages document
.pak Compressed file archive created by PAK (pak251.exe)
.pal Adobe Pagemaker Library Palette
.pan Printer-specific file (copy to (CorelDRAW)
.par Parts application (Digitalk PARTS)
.pas Pascal source code file
.pat Hatch patterns (AutoCAD – Photostyler)
.pax Pax Archive file
.pb Fax (FAXability Plus)
.pb1 Document (First Publisher for Windows)
.pba Powerbasic BASIC source code (Genus)
.pbd Phone book (FaxNOW! – Faxit)
.pbf Turtle Beach Pinnacle Bank file
.pbi Powerbasic include file (Genus)
.pbk Microsoft XP Remote Access Phonebook file
.pbl Powerbasic library (Genus)
.pbm Pbm Portable Bit Map graphics
.pbo Profiler Binary Output (MS Source Profiler)
.pbr Microsoft Publisher backup file
.pbt Profiler Binary Table (MS Source Profiler)
.pc Text file containing IBM PC specific info
.pc3 Custom palette (Harvard Graphics 3.0)
.pc8 Ascii text IBM8 character set (NewWave Write)
.pca Cash Register Express program
.pcb Broderbund Print Shop Business Card
.pcc Cutout picture vector graphics (PC Paintbrush)
.pcd Graphics (Kodak PhotoCD)
.pcf Profile Configuration file
.pch Patch file
.pcj Multimedia authoring tool graphics (IBM’s Linkaway-Live)
.pck Received Package file
.pcl HP-PCL graphics data (HP Printer Control Language)
.pcm Plasmacam CAD/CAM system file
.pcs PICS Animation
.pct Bitmap Graphic
.pcw Text file (PC Write)
.pcx Bitmap graphics (PC Paintbrush)
.pd SynerGEE Stoner software files (compressible pipe flow program)
.pda Bitmap graphics
.pdb Data (TACT)
.pdc Personal Database Creator file
.pdd Adobe PhotoDeluxe Image
.pde Principalm Data Extract files
.pdf Adobe Portable Document Format
.pdg Printshop Deluxe files
.pdl Project Description Language file (Borland C++ 4.5)
.pdr Port or printer driver
.pds Incredimail
.pdt ProCite Primary Database
.pdv Printer driver (Paintbrush)
.pdw Document (Professional Draw)
.pdx Adobe Acrobat Index file
.pe4 Photo Explorer Thumbnail
.pea PeaZip Compressed FileArchived files
.peb Program Editor bottom overflow file (WordPerfect Library)
.ped Program Editor delete save (WordPerfect Library)
.pem Program Editor macro (WordPerfect Library)
.peq Program Editor print queue file (WordPerfect Library)
.per Program Editor resident area (WordPerfect Library) (vakioalue)
.pes Program Editor work space file (WordPerfect Library)
.pet Program Editor top overflow file (WordPerfect Library)
.pf Windows Prefetch file
.pfa Type 3 font file (unhinted PostScript font)
.pfb Type 1 PostScript font file
.pfc Text file (First Choice)
.pfg jEEPers file
.pfk Programmable function keys (XTreePro)
.pfl Family Lawyer Data file
.pfm Windows Type 1 font metric file
.pfs Database (PFS:FILE) – text file (PFS:Write)
.pft Printer font (ChiWriter)
.pg Pagefox File
.pgi Printer Graphics File device driver (PGRAPH library)
.pgm Portable Grayscale bitMap graphics
.pgp Support file (Pretty Good Privacy RSA System)
.pgs Manual page (man4dos)
.ph Optimized .goh file (Geoworks)
.phb NewLeaf PhraseBook
.phn Phone list (UltraFax – QmodemPro)
.pho Phone database (Metz Phone for Windows)
.php PHP Script
.phr Phrases (LocoScript)
.phtml PHP Script
.pic Pixar picture file (SDSC Image Tool)
.pif Program Information File (Windows 3.x)
.pim PIM Archive file
.pip Personalized menu and toolbar (MS Office)
.pit Compressed Mac file archive created by PACKIT (unpackit.zoo)
.pix Alias image file (SDSC Image Tool)
.pj Project (CA-SuperProject)
.pj64 Project 64 game files.mswmm Windows Movie Maker Project file
.pjt Project memo (FoxPro)
.pjx Project (FoxPro)
.pk Packed bitmap font bitmap file (TeX DVI drivers)
.pk3 American McGee Alice Archive
.pka Compressed file archive created by PKARC
.pkd Top Secret Crypto Gold file
.pkg Installer script (Next)
.pkk Private Key file
.pkt Packet Tracer Network Simulation file
.pl Perl source code file
.pl1 Room plan (3D Home Architect)
.pl3 Chart palette (Harvard Graphics 3.0)
.plb Library (FoxPro)
.plc Add-in file (functions – macros – applications) (Lotus 1-2-3)
.pll Pre-linked library (Clipper 5)
.pln Spreadsheet (WordPerfect for Win)
.plr Descent Pilot file
.pls DisorderTracker2 Sample
.plt AutoCAD HPGL Vector Graphic Plotter file
.pmv Pegasus Mail Filter Rule file
.pmx Pegasus Mail file
.pn3 Printer device driver (Harvard Graphics 3.0)
.pnf Precompiled Setup Information (Temporary file seen during installs)
.png Bitmap graphics (Portable Network Graphics)
.pnm Pbm Portable aNy Map (PNM) graphics
.pnt Macintosh painting
.pod OPENPROJ Project file
.poh Optimized .goh file (Geoworks)
.poi Point of interest file
.pop Messages index (PopMail)
.pos ProCite Output Styles
.pot PowerPoint template
.potx PowerPoint Open XML Template file
.pov Raytraced scene description file (Persistence Of Vision)
.pow Chord chart (PowerChords)
.pp Free Pascal Source Code file
.ppa PowerPoint Add-in
.ppb Button bar for Print Preview (WordPerfect for Win)
.ppd PostScript Printer Description (Acrobat)
.ppf Turtle Beach Pinnacle Program file
.ppg MS PowerPoint Ppresentation
.ppl Polaroidpaletteplus ColorKey device driver (Harvard Graphics 3.0)
.ppm Portable Pixel Map graphics
.ppo Pre-processor output (Clipper 5)
.ppp Publication (PagePlus)
.pps PowerPoint Slideshow
.ppsx MS Office PowerPoint Slide Show file
.ppt General file extension (PowerPoint)
.ppz PowerPoint Packaged Presentation
.pqa Palm Query Application File (database for wireless access)
.pqi Power Quest Drive imaging
.pr2 Presentation (Aldus Persuasion 2.x)
.pr2 Printer driver (dBASE IV)
.pr3 Postscript printer driver (dBASE IV)
.prc Corel Presentation file
.prd Printer driver (many)
.pre Presentation (Freelance Graphics)
.prf Pixel Run Format graphics (Improces – Fastgraph)
.prg Program (Atari)
.pri Printer definitions (LocoScript)
.prj Project
.prm Parameters
.prn DataCAD Windows Printer file
.pro Prolog source code file
.prs Printer Resource eg. fonts (WordPerfect for Win)
.prt CADKEY Part file
.prx Windows Media Settings file
.prz Freelance Graphics 97 file
.ps PostScript file (text/graphics) (ASCII)
.ps2 PostScript Level 2 file
.psb Pinnacle Sound Bank
.psd Adobe Photoshop file
.pse Bitmap graphics (IBM printer Page SEgment)
.psf Photoshop Proof Settings file
.psi PSION A-law Audio
.psm Music (MASI – ProTracker)
.psmdoc PrintShop Mail
.psp PaintShop Pro Image
.psr Project Scheduler Resource file
.pst MS Outlook personal folder
.psw WinXP Backup Password File
.pt3 Device driver (Harvard Graphics 3.0)
.pt4 Template (PageMaker 4)
.ptb Script (PubTech BatchWorks)
.ptm Macro (PubTech BatchWorks)
.ptn PaperPort Thumbnail Images
.ptp Act! Modem Sync file
.ptr Qwk reader pointer file (QMail)
.pts Infinity Engine Game Tileset
.ptx Real Legal E-Transcript
.pub Page template (MS Publisher)
.put Compressed file archive created by PUT (
.puz Across Lite Crossword Puzzle
.pva Hauppauge DVB-Software
.pvd Script (Instalit)
.pvl Library (Instalit)
.pvm Parallel Virtual Machine software library
.pvt Local Fidonet pointlist
.pw Text file (Professional Write)
.pwd Pocket Word document
.pwf ProCite Workforms
.pwi Pocket Word document
.pwl Password List
.pwm WebMoney Purse file
.pwp Text document (Professional WritePlus)
.pwz MS Powerpoint Wizard
.px Primary database index (Paradox)
.pxl Pocket Excel Spreadsheet
.pxv Modelworks Project File used in JPad Pro and SitePad Pro
.py Python script file
.pyc Compiled PYTHON script file
.pyd Binary Python Extension on Windows
.pyw Python GUI Script on Windows
.pz2 Curious Labs Poser Pose file
.pz3 Curious Labs Poser Document
.pza MGI PhotoSuite II/III/4 Album file
.pzd Default settings (Pizazz Plus)
.pzl [email protected] Puzzle
.pzo Overlay file (Pizazz Plus)
.pzp MGI PhotoSuite II/III/4 Project file
.pzs Settings (Pizazz Plus)
.pzt Transfer file (Pizazz Plus)
.pzx Swap file (Pizazz Plus)
.q05 Intuit Canada Quick tax file, tax return file
.q9q BladePro Graphic Plugin file
.qad QuickArt database
.qag Quick Access Group (Norton Desktop)
.qap Application (Omnis Quartz)
.qbb QuickBooks for Windows Backup file
.qbe Saved query (Query By Example) (dBASE IV – Quattro Pro)
.qbk Intuit Canada Quick tax file, backup copy of tax return file
.qbl Business Lawyer Document
.qbo Compiled query (dBASE IV)
.qbr QuickBooks Report
.qbw Spreadsheet (QuickBooks for Windows)
.qcn Qualcomm Phonebook file
.qcp Qualcomm PureVoice File
.qd0 Data file – segment 10 (Omnis Quartz)
.qd1 Data file – segment 1 (Omnis Quartz)
.qd2 Data file – segment 2 (Omnis Quartz)
.qd3 Data file – segment 3 (Omnis Quartz)
.qd4 Data file – segment 4 (Omnis Quartz)
.qd5 Data file – segment 5 (Omnis Quartz)
.qd6 Data file – segment 6 (Omnis Quartz)
.qd7 Data file – segment 7 (Omnis Quartz)
.qd8 Data file – segment 8 (Omnis Quartz)
.qd9 Data file – segment 9 (Omnis Quartz)
.qdat Quicktime Installer Cache
.qdb Quicken data file
.qdf Quicken for Windows data file
.qdt Quark Xpress Dictionary file
.qdv Graphics (Steve Blackstock Giffer)
.qe4 Kingpin Project file
.qef Query file (Q+E for MS Excel)
.qel Quicken Electronic Library file
.qfl Quicken Family Lawyer file
.qfx Quicken Financial Exchange file
.qhf QIP PDA History file
.qic Backup set for Microsoft Backup
.qif Quicken Interchange Format
.qix NovaStar Backup file
.qlb Quick library (MS C/C++)
.qlc Data (PostScript help file) atmfonts.qlc
.qlf Family Tree Maker Genealogy file
.qlp Printer driver (QuickLink)
.qm Virtual Box Language file
.qm4 Options or services file (QMail 4.x Mail Door)
.qml Quick Markup Language file
.qph Intuit Quicken Price History file
.qpr Generated query program (FoxPro)
.qpw Quattro Pro Project file
.qpx Compiled query program (FoxPro)
.qrp QuickReport Report files
.qrs Equation Editor support file (WordPerfect for Win)
.qrt Qrt ray tracing graphics
.qru SQL Query file
.qry Query (dBASE IV)
.qsd Quicken for Windows data file
.qsi Quintessential Stereotaxic Injector Commander log files
.qst Quake Spy Tab file
.qt Quicktime movie (animation)
.qtc Incite Media Assistant file
.qtk Apple QuickTake file format for Windows
.qtl Quick Time Media Link file
.qtp QuickTime Preferences
.qts Macintosh PICT image
.qtx QuickTime image
.que CuteFTP Queue file
.qvm Quake file
.qvs Casio Digital Camera file
.qw Symantec Q&A Write file
.qwk QWK reader message file
.qxd QuarkXPress document file format
.qxl Element library (QuarkXPress)
.qxp QuarkXPress project file
.qxt Template file (QuarkXpress)
.r Ratfor (FORTRAN preprosessor) file
.r33 Train Simulator Game file
.r8 Raw graphics (one byte per pixel) plane one (PicLab)
.r8p Pcl 4 bitmap font file (Intellifont)
.ra Music (RealAudio)
.ram Ramfile (RealAudio)
.rar Compressed file archive created by RAR (rar1_402.exe)
.ras Sun Rasterfile graphics
.rat Datafile (RATS)
.raw Raw RGB 24-bit graphics
.rb Ruby on Rails class file
.rbf Windows Installer Rollback file
.rbn Richard’s Bridge Notation
.rbs Windows Installer Rollback Script file
.rbx Format for playing RapidPlayer v3.0 ActiveX Control in Explorer
.rc Resource script (Visual C/C++ – Borland C++)
.rcf Rhapsody Storage file
.rcg Netscape newsgroup file (netsc.rcg)
.rcp Recomposer’s MIDI Sequencer Music file
.rcx Lego Mindstorms Robotics Invention System
.rdb TrueVector Rules database
.rdf Compiled UIC source code (Geoworks UI Compiler)
.rdi Device-independent bitmap file (RIFF RDIB format)
.rds Ray Dream Studio file
.rdx Datafile (Reflex)
.rec Datafile (EpiInfo)
.red Path info (Clarion Modula-2)
.ref Cross-reference
.reg OLE Registration (Windows 3.x)
.rels Microsoft Office 2007 Relationships
.rem Encrypted Data file
.rep QWK reader reply file
.req Request
.res Compiled resource (MS C/C++ – Borland C++)
.rev Revision file (Geoworks)
.rex Rexx source code file
.rex Report definition (Oracle)
.rez Resource file
.rf Sun raster graphics
.rfl Roll Forward Log file
.rft Dca/RFT Revisable Format Text file (IBM DisplayWrite 4.0-5.1)
.rgb Sgi RGB image file (SDSC Image Tool)
.rgi RealArcade Game Installer
.rgp RealArcade Game Package
.rgs RealArcade Game Installer
.rgx Symbol tables etc. info (ReaGeniX code generator)
.rh Resource header file (Borland C++ 4.5)
.rhp Rhapsody Notation Program File Format
.ri Data (Lotus 1-2-3)
.rib Graphics in Renderman format (3DReality)
.ric Fax (Ricoh)
.rif Riff bitmap graphics (Fractal Design Painter)
.rip Graphics (Remote Access)
.rix Bitmap graphics (ColorRIX VGA Paint)
.rl4 Bitmap graphics
.rl8 Bitmap graphics
.rla Wavefront raster image file (SDSC Image Tool)
.rlb Data (Harvard Graphics Win) hgw.rlb
.rlc Graphics 1bit/pixel scanner output
.rle Utah Run Length Encoded raster graphic (SDSC Image Tool)
.rlz Realizer source code file (CA-Realizer)
.rm RealMedia file
.rm RealMedia
.rmf Rich Map Format
.rmi Midi file (RIFF RMID format)
.rmj Real Jukebox file
.rmk Makefile (Clipper RMake)
.rmm RealPlayer file
.rmr Resume Maker file
.rms Secure Real Media file
.rmvb Video file for Realplayer
.rmvb Real Media video file
.rmx RealJukeBox MP3 file
.rn Xpl program for Nota Bene users
.rnd Rendering Slide (AutoCAD AutoShade)
.rno Runoff file (VAX)
.roi Actuate ReportBlast file
.rol Fm music Adlib Music File (Roland)
.rpd Database (RapidFile)
.rpl Text document (Replica)
.rpm RedHat Package Manager
.rps Propellerhead Software Reason Song
.rpt Report
.rrd ERDAS Imagine file
.rs Data file (Amiga Resource – Reassembler)
.rs_ Resource fork of a Macintosh file (Mac-ette)
.rsb Red Storm Image Format
.rsc Resource file
.rsm ReliaSoft MPC 3
.rsp Response file
.rss Rockwell Logix PLC file
.rst ANSYS Results
.rsw ReliaSoft BlockSim
.rtc Live Meeting Connection file
.rtf Rich Text Format text file (many – Windows Word)
.rtl Run Time Library (NU 7.0)
.rtp Turbo Tax Update file
.rts Runtime library file (CA-Realizer)
.rtx Reliacast Audience Manager Turnstile
.ru JavaSoft Library file
.rul InstallShield
.run RunScanner Saved file
.rv RealVideo Video file
.rvb Rhinoscript file
.rvp MS Scan Configuration file
.rvw Review
.rwg Random Word Generator List file
.rws Resource Workshop data file (Borland C++)
.rwx Script (RenderWare)
.rwz MS Outlook Rules Wizard file
.rzk Red Zion File Crypt (password file)
.rzr in-sync Speed Razor Project file
.rzx in-sync Speed Razor Project file
.s Assembly source code file (Unix)
.s$$ Temporary sort file (Sprint)
.s3m Music (16 channels) (Scream Tracker 3.0)
.sac Shared Asset Catalog (Adobe)
.saf MusicMatch Jukebox Secure Audio file
.sah [email protected] data file
.sal Datafile (SORITEC)
.sam Text file (Samna – Lotus Ami/Ami Pro)
.sar Compressed file archive created by SAR (
.sas SAS System program
.sas7bcat SAS System file catalog
.sas7bdat SAS System data set
.sas7bndx SAS System index
.sas7bpgm SAS System Stored Program
.sas7bvew SAS Data Set View
.sas7mdb SAS System multidimensional database
.sat Standard ACIS Text file
.sav Backup file (saved file)
.sb Audio file (signed byte)
.sbc Sagebrush Corporation Spectrum CIRC/CAT Report
.sbd Storyboard (Storyboard Editor)
.sbi Sound Blaster Instrument file (Creative Labs)
.sbj Micrografx Clipart or Palette file
.sbn ArcView file (GIS)
.sbp Dml program (Superbase 4)
.sbr Support file (Source Browser)
.sbs SWAT HRU Output file
.sbt Notes related to record (Suberbase 4 Windows)
.sbx ArcView file (GIS)
.sc Pal script (Paradox)
.sc3 Renamed dBASE III screen mask file (dBASE IV)
.sca Datafile (SCA)
.scc Text file
.scd Scodl Scan Conversion Object Description Language graphics
.scf Multimedia show (ScoreMaker)
.sch Project schedule (Schedule Publisher)
.sci System Configuration Information
.scm Scheme source code file
.scn Screen file (Kermit)
.sco High score
.scp Script (BITCOM)
.scr Debug source code file (DOS Debug)
.sct Screen memo (FoxPro)
.scx Bitmap graphics (ColorRIX)
.scy Security file (ReaGeniX)
.sda Fidonet’s Software Distribution Network file archive description
.sdc StarOffice Spreadsheet
.sdd StarOffice Presentation
.sdf System Data Format file (fixed lenght ASCII text)
.sdi Software Distribution Network Info file
.sdn Software Distribution Network compressd file archive (pak251.exe)
.sdr SmartDraw file
.sds Chart Application Document file
.sdt SmartDraw Template
.sdu Edwards Systems Technology file
.sdw StarOffice Text
.sea Self-Extracting compressed Macintosh file Archive
.sec CyberPaint animation file (sequence)
.sed Self Extraction Directive file
.sep Printer separator page
.seq Atari animation file
.ses Session info (Clarion Modula-2)
.set Configuration (1st Reader)
.sf Ircam Sound File (CSound package – MixView sound sample editor)
.sf2 Creative Labs Soundfont file
.sfb HP Soft Font file
.sfc System File Checker file
.sff Fritz Fax-Print file
.sfi Graphics (SIS Framegrabber)
.sfl Pcl 4 bitmap font (landscape) (Intellifont) (Ventura Publisher)
.sfn Font (SPX)
.sfo CuteFTP Search file
.sfp Pcl 4 bitmap font (portrait) (Intellifont) (Ventura Publisher)
.sfs Pcl 5 scalable font file (Intellifont)
.sft Screen font (ChiWriter)
.sfv QuickSFV/WinSFV Checksum file
.sfw Seattle Film Works file
.sfx Self Extracting Archive file
.sg1 Graphics (Stanford Graphics)
.sgf Document with graphics (Starwriter)
.sgi Graphics (IRIS – Silicon Graphics)
.sgm Standard Generalized Markup Language file
.sgn Sierra Print Artist Sign
.sgp Statistics (STATGRAPHICS Plus)
.sgt Save/get keyboard macro (Signature)
.sh Unix shell script
.sh3 Presentation (Harvard Graphics 3.0)
.sha Shell Archive file
.shb Background (CorelShow)
.shd Microsoft Windows Shadow file
.shg Segmented-graphics bitmap
.shk Compressed Apple II file archive created by SHRINKIT
.shm Shell macro (WordPerfect Library)
.shn Shorten audio compression file
.shp Shape file and source file for text fonts (AutoCAD)
.shr Unix ASCII file archive created by SHAR (
.shs Microsoft Word or Excel scrap file which is created when you drag and drop selected text
.shtml HTML File with Server Side
.shw Presentation (Harvard Graphics 2.0 – CorelShow)
.shx Shape entities (AutoCAD)
.sid Commodore64 Music file
.sif Setup Installation Files info (Windows NT Setup)
.sig Current program settings (Signature)
.sik Backup file (Sicherungskopie) (MS Word)
.sim Aurora
.sis SymbianOS Installer file
.sit Compressed Macintosh archive created by STUFFIT (
.sitx Stuffit SITX Compressed File
.skb SketchUp software file (3D Design Tool)
.skf Autosketch file
.skin Skin file
.skm Google Sketchup Texture file
.skn Interface skins images (FileWrangler, SecurDesk!, SecurDesk! LV, ZipWrangler)
.skp Sketchup software component (3D Design Tool)
.sl S-Lang source code file
.slb Slide library (AutoCAD)
.slc Compiled SALT script (Telix)
.sld Slide (AutoCAD)
.slf BitDefender file
.sli Slide (MAGICorp Slide Service)
.slk Sylk Symbolic Link format data file (MultiPlan)
.sll Sound data file
.sln Microsoft Visual Studio Solution file
.slt Salt Script Application Language for Telix script source (Telix)
.sm Smalltalk source code file
.smc Super Nintendo Game-console ROM Image
.smd StarOffice Mail
.smf Fax (SMARTFAX)
.smi RealPlay SMIL file
.smil Synchronized Multimedia Integration Language file
.smk Compressed File (Smacker)
.smm Macro (Ami Pro)
.smp Sample (sound file)
.sms Microsoft Package Definition file
.smt Text file (Smart Ware II)
.smtmp SMTMP Virus
.snd Digitized sound file (Macintosh/ATARI/PC)
.sng Song (midi sound) (Midisoft Studio – Prism)
.snm Netscape mail
.sno Snobol4 source code file
.snp CoffeeCup HTML Editor Snippet
.snx Mirage Microdrive Snapshot Extended Version
.so Apache Module file
.sol Flash shared object file
.som Network serial numbers (Quattro Pro)
.son Song (SBStudio II)
.sou Sound data (sound tool)
.sp Compressed file archive created by SPLINT (unix)
.spa Macromedia FutureSplash file
.spc Program (MS Multiplan)
.spd Scalable font (Speedo) (Harvard Graphics 3.0)
.spf Slide presentation file (EnerGraphics)
.spg Glossary (Sprint)
.spi Graphics (Siemens and Philips scanner)
.spi InConSoft Ltd. Sim-Path system files
.spl Compressed file archive created by SPLINT (splint.arc)
.spm Data (WordPerfect) wp{wp}.spm
.spo Statistical Program (SPSS)
.spp Printer file (Sprint)
.spr Document letter (Sprint)
.sps Spssx source code file (VAX/VMS)
.spt Spitbol source code file
.spv InConSoft Ltd Sim-Path vehicle file
.spw Worksheet (SigmaPlot)
.spx Compiled screen program (FoxPro)
.sql SQL report or query
.sqlite SQLite Database file
.sqm Service Quality Monitoring file
.sqz Compressed file archive created by SQUEEZE (sqz1083e.exe)
.src Source (DataFlex)
.srf Sun Raster File graphics
.srp Script (QuickLink)
.srt BSplayer Subtitle file
.ss Bitmap graphics (Splash)
.ssa Subtitles
.ssb SmartSync Pro
.ssd Datafile (SAS/PC)
.ssf Snagit file
.ssm RealPlayer Standard Streaming Metafile
.ssp Datafile (SAS Transport)
.st Smalltalk source code file (Little Smalltalk)
.st3 MIDI Karaoke file
.sta Adobe Photoshop Match Colour Image Statistics file
.stb Stub library (Genus GX Kernel)
.std State Transition Diagram graphic file (Prosa)
.stf Compressed file archive created by SHRINKTOFIT
.stg ActiveSync (Microsoft) Backup file
.stl C++ Standard Template Library
.stm State Transition Diagram model file (Prosa)
.stn ArcView Geocoding Standardization file
.sto Pascal stub OBJ file (Genus GX Kernel)
.stp Sharepoint Web Site Template File
.str Structure list object file (dBASE Application Generator)
.sts Project status info (MS C/C++)
.stt Automap Template
.stu Tarantella Enterprise 3 3270 Emulator Style file
.stw Data file (SmartTerm for Windows)
.stx Electronic book (SmarText)
.sty Style library or sheet (many text and graphics programs)
.sub CloneCd related file
.sui Suit library (Simple User Interface Toolkit)
.sum Summary
.sun Sun rasterfile graphics
.sup Supplementary dictionary (WordPerfect for Win)
.sv4 RollerCoaster Tycoon Saved Game
.svd Autosave file for document (MS Word)
.svg Autosave file for glossary (MS Word)
.svgz Compressed Scaleable Graphic file
.svp WISCO Survey Power
.svs Autosave file for style sheet (MS Word)
.sw Audio file (signed word)
.swd Storybook file
.swf ShockWave Flash object
.swg Swag packet (SWAG Reader)
.swi Swish Data file
.swk Swapkeys Keyboard File
.swp Document backup (Sprint)
.sxc StarOffice / OpenOffice Spreadsheet file
.sxw Writer 6.0 text file
.sy1 Smartpix symbol library (Ami Pro)
.sy3 Symbol file (Harvard Graphics 3.0)
.syd Backup of startup files created by QEMM (?) autoexec.syd
.sym Precompiled headers (Borland C++)
.syn Sdsc Synu image file (SDSC Image Tool)
.sys Datafile (SYGRAPH – SYSTAT – SPSS/PC)
.syw Graphics symbols (Harvard Graphics Win)
.szc Windows Mobile 5 (Pocket PC)
.t Tads source
.t$m AVG Internet Security Temporary file
.t04 TaxCut 2004 file
.t05 TaxCut 2005 Tax Return
.t06 TaxCut 2006 Tax Return
.t07 TaxCut 2007 Tax Return
.t08 TaxCut 2008 Tax Return
.t09 H&R Block At Home 2009 Tax Return
.t10 H&R Block At Home 2010 Tax Return
.t11 H&R Block At Home 2011 Tax Return
.t12 H&R Block At Home 2012 Tax Return
.t2 Textease 2000 file
.t44 Temporary file for Sort or Index (dBASE IV)
.t64 Program (C64S emulator)
.ta0 TaxAct file
.tab Guitar Tablature file
.tag Query tag name (DataFlex)
.tah Turbo Assembler Help file (Borland C++)
.tal Text illustration (TypeAlign)
.tao IsoBuster file
.tar Compressed file archive created by TAR (pax2exe.zoo)
.tax TurboTax file
.taz Compressed ASCII file archive created by TAR and COMPRESS (.tar.Z)
.tb1 Font file (Borland Turbo C)
.tb2 Font file (Borland Turbo C)
.tbf Fax (Imavox TurboFax)
.tbh Mah Jongg for Windows Tile Set
.tbk Memo backup (dBASE IV – FoxPro)
.tbl Graphics (native format) (Adobe PageMaker TableEditor)
.tbs Text elements ?? (Textbausteine) (MS Word)
.tbx Table (Project Scheduler 4)
.tc Configuration (Turbo C – Borland C++)
.tch Turbo C Help file (Borland C++)
.tcl Tool Command Language source code (Swat)
.tcp 3D Topicscape (exported inter-Topicscape topic link)
.tcw Drawing (TurboCAD for Windows)
.td Configuration file (Turbo Debugger for DOS)
.td0 Disk image file (Teledisk)
.td2 Configuration file (Turbo Debugger for Win32)
.tdb Database (TACT)
.tdf Font (TheDraw)
.tdh Help file (Turbo Debugger)
.tdk Keystroke recording file (Turbo Debugger)
.tds Symbol table (Turbo Debugger)
.tdt ASCII Data File in CSV Format
.tdw Configuration file (Turbo Debugger for Windows)
.tee TeeChart Office graphic
.tef Fax (Relisys TEFAX)
.tel Host file (Telnet)
.tem Turbo Editor Macro Language script (Borland C++)
.temp Temporary file
.test Test File Extension
.tex LaTeX Source Document file
.text ASCII Text file
.tf Configuration (Turbo Profiler)
.tfa Area file (Turbo Profiler)
.tfc Catalogue file (Tobi’s Floppy Cataloguer)
.tfh Help file (Turbo Profiler)
.tfm Tex Font Metric file (TeX)
.tfs Statistics (Turbo Profiler)
.tfw ArcView World File For TIF Image
.tg1 Project file (On Target)
.tga Truevision Targa bitmap graphics
.tgz Compressed file archive created by TAR and GNUzip (.tar.gz)
.thb KinuPix Skin
.thd Thread
.thm Thumbnail Image file
.thn Graphics Workshop for Windows Thumbnail
.ths Thesaurus dictionary (WordPerfect for Win)
.tib Acronis True Image file
.tif Tagged Image File Format bitmap graphics (PageMaker – CorelDRAW)
.tiff Tagged Image File Format
.til Fuzzy logic knowledge base (Togai InfraLogic Fuzzy-C Compiler)
.tim Playstation Game Texture Image
.tis Tile set (MahJongg 3.0)
.tix ASA for UNIX Terminfo Extension file
.tjl Backup file (VAXTPU editor)
.tlb OLE Type Library
.tlc Compiled Tool Command Language source code (Swat)
.tlp Project (TimeLine)
.tlt Trellix Web Design file
.tmb Timbuktu Pro Connection Document
.tmd Document (TextMaker)
.tmf Tagged Font Metric file (WordPerfect for Win)
.tmo Ztg global optimizer default output file (Zortech C++)
.tmp Temporary file
.tmpl eMule Web Interface Template file
.tmq TestMaster file
.tms Script (Telemate)
.tmv Template (TextMaker)
.toc Table Of Contents
.tol Kodak Photoenhancer
.TOPC TopicCrunch project file for saving and resubmitting SEO searches
.tos Self-extracting file archive (Atari ST)
.tp Configuration (Turbo Pascal)
.tp3 Template (Harvard Graphics 3.0)
.tpb Downloadable PCL Soft font file backup (HiJaak)
.tpf Downloadable PCL Soft font file (HiJaak)
.tph Help file (Turbo Pascal)
.tpi Microsoft Test file
.tpl Document Template file
.tpp Protected Mode Units (Borland Pascal 7.0)
.tps Clarion for Windows data file
.tpu Turbo Pascal Unit (BGI) (Turbo Pascal)
.tpw Session-state file (Turbo Profiler for Windows)
.tpz Compressed file archive created by TAR and GNUzip (.tar.gz)
.tr Session-state settings (Turbo Debugger for DOS)
.tr2 Session-state settings (Turbo Debugger for Win32)
.trace ECXpert Debugging file
.trc Debug support file (Power CTrace)
.tre Directory tree file (PC-Tools)
.trg Symantec LiveUpdate file
.tri Trigram file
.trk Kermit Script file
.trm Terminal settings (Windows 3.x)
.trn Translation support file (Quattro)
.trp Tripmaker file
.trs Executable file (Micrografx)
.trw Session-state settings (Turbo Debugger for Windows)
.trx Router Firmware file
.ts Transport Stream file
.tsk Skins for Pocket PC PDAs
.tsp Windows Telephony Service Provider
.tst Printer test file (WordPerfect for Win)
.tsv Tab Separated Value file
.tt10 Turbotax 2010 Return file
.tta The True Audio Codec file
.ttc OpenType font file
.ttf Truetype Font file
.tub PaintShop Pro Tube file
.tut Tutorial
.tv Table view settings (Paradox)
.tv1 Overflow file above insert point in Doc 1 (WordPerfect for Win)
.tv2 Overflow file above insert point in Doc 2 (WordPerfect for Win)
.tv3 Overflow file above insert point in Doc 3 (WordPerfect for Win)
.tv4 Overflow file above insert point in Doc 4 (WordPerfect for Win)
.tv5 Overflow file above insert point in Doc 5 (WordPerfect for Win)
.tv6 Overflow file above insert point in Doc 6 (WordPerfect for Win)
.tv7 Overflow file above insert point in Doc 7 (WordPerfect for Win)
.tv8 Overflow file above insert point in Doc 8 (WordPerfect for Win)
.tv9 Overflow file above insert point in Doc 9 (WordPerfect for Win)
.tvf Table view settings (dBASE)
.tvo TeveoLive
.tvp NVIDIA Graphic Card Update file
.tvr Navicat for MySQL file
.tvt RealPlayer
.txd Grand Theft Auto 3 Texture file
.txf Compressed file archive created by TAR and FREEZE (.tar.f)
.txi Support file (TeX)
.txl Genesis3D Texture file
.txt Text file
.tym Time Stamp (PageMaker 4)
.tz Compressed file archive created by TAR and COMPRESS (.tar.Z)
.tzb Compressed file archive created by TAR – COMPRESS – BTOA (.tar.Z.btoa)
.uax Unreal Audio file
.ub Audio file (unsigned byte)
.uc2 Compressed file archive created by UltraCompressor II (
.ucn New compressed file archive created by UltraCompressor II
.ucs Universal Classification Standard Database file
.udc Acrobat Spelling file
.udf Filter (Photostyler)
.udl MS Data Link
.uds Sierra Generations Family file
.ue2 Encrypted file archive created by UltraCompressor II
.ufo Ulead PhotoImpact Graphic file
.uha UHARC Compressed Archive file
.uhs Universal Hint System (binary file)
.ui Espire source code file (Geoworks UI Compiler)
.uif MagicISO Disc Image file
.uih Espire header file (Geoworks UI Compiler)
.uis WindowBlinds (Copyright Neil Banfield &, Inc.)
.ul Ulaw audio file
.uld Information about uploaded files (Procomm Plus)
.ult Music (UltraTracker)
.umb Backup file (MemMaker)
.umd Universal Media Disc file
.umf Stockmoves, MOTEK BV
.umx Unreal music file
.uni Unimod music module (MIKMOD)
.unl Garmin Unlock file
.unq Fax View file
.uns2 Ultra Notes Backup file
.unx Text file containing UNIX specific info
.upd Program update info
.upg Firmware Upgrade file
.upo Compiled update data (dBASE)
.upx ULead Photo Express Saved Image file
.url Uniform Resource Locator (Internet shortcut)
.urls GetRight URL List file
.usb D-Link FM Radio Update
.user Visual Studio User Options file
.usp Printer font with USASCII extended character set (PageMaker)
.usr User database file (Procomm Plus – Turbo C++ tour)
.utf AOL Updating Files
.utl Sound file
.utx Unreal Engine Texture file
.uu Compressed ASCII file archive created by UUDE/ENCODE
.uue Compressed ASCII file archive created by UUENCODE (uuexe515.exe)
.uvf CSV (comma separated value) format. Used by Netica
.uvr Ulead Cool 360 Viewer file
.uw Audio file (unsigned word)
.uwl WordPerfect User Word List file
.v Consistency check support file (ReaGeniX code generator)
.v2 Microsoft Live Messenger data file
.v64 Nintento 64 Emulation ROM Image
.val Validity checks and referential integrity (Paradox for Windows)
.van Animation (VistaPro)
.var Variable file (IconAuthor)
.vbc Visual Business Cards
.vbd ActiveX file
.vbe VBScript Encoded Script file
.vbn Norton Corporate anti-virus quarantined file
.vbp Visual Basic Project file
.vbs Visual Basic Script file (Visual Basic)
.vbw Visual Basic Project Workplace (Visual Basic)
.vbx Visual Basic eXtension (Visual Basic)
.vc Include file with color definitions (Vivid 2.0)
.vc4 Virtual CD/DVD Image file
.vcd VisualCADD Drawing file
.vce Visual CE Class Type file
.vcf VCard file
.vch Interlock Public Computer Utility
.vcmf VAIO Content Metadata file
.vcs vCalender file
.vcw Visual workbench information (MS Visual C++)
.vcx Spreatsheet (VisiCalc Advanced)
.vda Bitmap graphics
.vdb Norton AntiVirus Corporate Edition Update file
.vdf Avira AntiVir virus definition file
.vdi Virtual Disk Images files
.vdj Virtual DJ Sample file
.vdm VDM Play
.vdr Drawing (ComputerEasy Draw)
.vdx XML for Visio Drawing file
.vem VeePro Embroidery Software Format
.ver Version Description file
.vew View file (Clipper 5, Lotus Approach)
.vfm Voting Form (Voter)
.vfn Voting Form for Customers (Voter)
.vfp TMPGEnc VFAPI Plug-in
.vfs Virtual File System Index
.vfx Ulead Video Studio Sample file
.vga Vga display driver
.vgd Vga display driver (Generic CADD)
.vgr Graphics (Ventura Publisher)
.vhd Virtual Hard Disk file
.vi Graphics (Jovian Logic VI)
.vic Vicar graphics
.vid Video file
.vif Khoros Visualization image file (SDSC Image Tool)
.vik Viking graphics
.vir Virus Infected file
.vis Vis graphics
.viv VivoActive Player Video file
.vlm Ashlar-Vellum file
.vlt WinVault Container file
.vm Virtual Memory file (Geoworks)
.vm1 Panasonic SD Voice Editor file
.vmc Virtual memory configuration (Acrobat reader)
.vmdk VMware Image file
.vmf Font characteristics (Ventura Publisher)
.vmg Text Message files
.vml Vector Markup Language
.vmo Mobile Phone voice file (Siemens Sl45)
.vmp Logos Library System 2.x Verse Map
.vms Text file containing VMS specific info
.vmt Valve Material file. Details how a material is to be rendered
.vmx VMware Configuration file
.vnt vNote file
.vo Include file with object definition (Vivid 2.0)
.vob DVD video movie file
.voc Digitized samples (Creative Voice file)
.vof Object folder (VZ Programmer)
.vol VOL Archive file
.vor Template
.vox Vox Audio
.vp6 TrueMotion VP6 Video file
.vpa Excite Chat Gestures file
.vpd Virpet Performance Descriptor
.vpg Graphics (VPGraphics)
.vpk Steam Package Archive file
.vpl Karaoke Player Playlist file
.vpp Virtual Pool Game
.vqe Yamaha Sound-VQ Locator File
.vqf Yamaha Sound-VQ File
.vql Yamaha Sound-VQ Locator File
.vrd VRScape data file
.vrm Overlay file (QuattroPro)
.vro Panasonic DVD Recorder file
.vrp Project (WATCOM VX?Rexx)
.vrs Video Resource eg. video device driver (WordPerfect)
.vs Include file with surface definition (Vivid 2.0)
.vsd Diagram (Shapeware Visio)
.vsl GetRight Download List file
.vsm Simulation model (VisSim)
.vsp Visual Studio file
.vss Smartshapes file (Shapeware Visio)
.vst Truevision Vista bitmap graphics
.vtf Valve Texture file. Used to store texture data
.vts DVD File format
.vtx XML for Visio template file
.vue Animation (3D Studio)
.vw Text file (Volkswriter)
.vw3 Text file (Volkswriter 3)
.vwl VideoWave Video Wave Library
.vwr File viewer file (PC Tools)
.vwt VideoWave Thumbnail
.vxd Virtual device driver (MS Windows)
.vyd VyperHelp
.w Database AppBuilder Source Code file
.w02 Multiple Archive file
.w30 Printer font (AST TurboLaser) (Ventura Publisher)
.w31 Startup file (Windows 3.1)
.w3g Warcraft III file
.w3m Warcraft III Map file
.w44 Temporary file for Sort or Index (dBASE)
.w5v Winamp file
.wab Outlook File
.wac Infinity Game Engine WAVC Sound
.wad Doom Game file
.waf Mayim’s WAF Compiler file
.wal Winamp Skin file
.war Java Web Archive (used by Servlets)
.wav Waveform audio file (RIFF WAVE format)
.wax Windows Media Player Redirect file
.wb1 Notebook (Quattro Pro)
.wb2 Spreadsheet (Quattro Pro)
.wb3 Quattro Pro for Windows
.wba WindowBlinds Compressed Skin
.wbc Webshots Picture Collection
.wbf Ms Windows Batch File (Catch)
.wbk Document/workbook (WordPerfect for Win)
.wbmp Wireless Application Protocol Bitmap file
.wbt Batch file (WinBatch)
.wbx Webigger file
.wbz WebShots file
.wcd Macro token list (WordPerfect for Win)
.wcm Data transmission file (MS Works)
.wcp Product information description (WordPerfect for Win)
.wd2 Info Select for Palm Organizer file
.wdb Database (MS Works)
.wdf ReliaSoft Weibull 5.0
.wdl Windows XP Watchdog Log file
.web Web source code file
.wer Microsoft Windows Error Report file
.wfc Windows Connect Now file
.wfm Form object (dBASE Form Designer)
.wfn Font (CorelDRAW)
.wfx Data file (Winfax)
.wg1 Worksheet (Lotus 1-2-3/G)
.wg2 Worksheet (Lotus 1-2-3 for OS/2)
.wgt Opera Widget file
.wid Width table (Ventura Publisher)
.wim Image Format file
.win Opera Saved Window file
.wiz Page wizard (MS Publisher)
.wjp WildTangent Branded .jpg file
.wk1 Spreadsheet (Lotus 1-2-3 version 2.x – Symphony 1.1+)
.wk3 Spreadsheet (Lotus 1-2-3 version 3.x)
.wk4 Spreadsheet (Lotus 1-2-3 version 3.4)
.wkb Document (WordPerfect for Win)
.wke Spreatsheet (Lotus 1-2-3 educational version)
.wkq Spreatsheet (Quattro)
.wks Spreadsheet (Lotus 1-2-3 version 1A – Symphony 1.0 – MS Works)
.wlk Graphics (Virtus Walkthrough)
.wll Word Add-in
.wlt eWallet file
.wma Microsoft Active Streaming file
.wmc Backup of startup files by Windows MathCad autoexec.wmc
.wmf Windows MetaFile vector graphics
.wml Wireless Markup Language
.wmv MS Active Streaming file
.wmz Windows Media Compressed skin file
.wn Text (NeXT WriteNow)
.wnf Outline font description (CorelDRAW native format)
.wo4 STABCAL file
.wo7 STABCAL file
.woa Swap file (Windows 3.x)
.woc Microsoft Office 2007 Organization file
.wor MapInfo Workspace
.wot WebEx Saved Meeting Movie
.wow Music (8 channels) (Grave Mod Player)
.wp Text file (WordPerfect 4.2)
.wp3 Microsoft Photo Story Project file
.wp5 Document (WordPerfect 5.x)
.wpd Document (WordPerfect 6.0 – PFS:WindowWorks)
.wpf Fax (WorldPort)
.wpg WildTangent Branded .PNG file
.wpj MS Works Projects
.wpk Macros (WordPerfect for Win)
.wpl Windows Media Player Playlist file
.wpm Macros (WordPerfect)
.wps Text document (MS Works)
.wpt WordPerfect template
.wpw PerfectWorks document
.wq! Compressed spreadsheet (Quattro Pro)
.wq1 Spreadsheet (Quattro Pro)
.wr1 Spreadsheet (Symphony 1.1 – 1.2 – 2)
.wrd Template (Charisma)
.wrf used for WebEx recording. Microsoft office add-in for meeting
.wri Text file (Windows Write)
.wrk Spreadsheet (Symphony 1.0, 1.2, 2.0, 3.0)
.wrl Plain text VRML file
.wrml Plain text VRML file
.wrp Compressed Amiga file archive created by WARP
.wrs Windows Resource eg. printer driver (WordPerfect for Win)
.ws Text file (WordStar 5.0-6.0)
.ws2 Text file (WordStar 2000)
.wsc Windows scripting component file
.wsd Document (WordStar)
.wsf Windows Script file
.wsf Windows Script file
.wsh Windows Script Host Settings file
.wsp Workspace (Fortran PowerStation)
.wsr FirstStop WebSearch file
.wss Web Screen Saver file (Web Screen Saver 2008)
.wss Web Screen Saver file (Web Screen Saver 2008)
.wst Text file (WordStar)
.wsx WinMX Filesharing Program
.wsz Skin Zip file (WinAmp)
.wtd WinTune Document file
.wtr MS Encarta file
.wv WavPack compressed Audio file
.wve Component of a DIVX Movie Conversion
.wvw Backup Wonderware InTouch window file
.wvx Metafile
.wwb Button bar for document window (WordPerfect for Win)
.wwk Keyboard layout (WordPerfect for Win)
.wwp Worms World Party Teams file
.wws AutoRoute User Information
.wwv WildTangent Branded .WAV file
.wxp Document (EXP for Windows)
.wxs Easy Cross crosstitch file
.wzg WZebra file
.wzs Microsoft Word wizard
.x DirectX Object file
.x01 Secondary index (Paradox)
.x02 Secondary index (Paradox)
.x03 Secondary index (Paradox)
.x04 Secondary index (Paradox)
.x05 Secondary index (Paradox)
.x06 Secondary index (Paradox)
.x07 Secondary index (Paradox)
.x08 Secondary index (Paradox)
.x09 Secondary index (Paradox)
.x16 Macromedia Program Extension (16-bit)
.x32 Macromedia Program Extension (32-bit)
.xap Silveright Application Package
.xbel XML Bookmark Exchange Language file
.xbm X11 Bitmap graphics
.xcf Gimp Image file
.xdf Milnta APL Transfer Function
.xdw X Windows Screen Dump file
.xef X-Genics eManager – XML form and data for eManager
.xem X-Genics eManager – Metered units / credit definition for forms/file usage in eManager
.xep X-Genics eManager – File packaging / unpacking information for eManager components
.xes X-Genics eManager – XML definition for UI skins
.xet X-Genics eManager – XML definition for eManager process
.xev X-Genics eManager – File download definition for auto-update and delivery of new procedures
.xez X-Genics eManager – Template package for eManager
.xfd XML Form in XFDL Format
.xfdl Extensible Forms Description Language file
.xfn Printer font (Xerox 4045) (Ventura Publisher)
.xft 24 pin printer font (ChiWriter)
.xfx Fax File (various)
.xhtml Extensible HyperText Markup Language file
.xi Fast Tracker 2 Instrument or ScreamTracker Instrument file
.xif Wang image file
.xla Xlib Archive (
.xla Add-in macro sheet (MS Excel)
.xlb Data (MS Excel)
.xlc Chart document (MS Excel)
.xlk Excel Backup
.xll Excel Dynamic Link Library (MS Excel)
.xlm Macro sheet (MS Excel)
.xlr MS Works file
.xls Spreadsheet(MS Works)
.xlsm Microsoft Excel Macro-Enabled Workbook file
.xlsx Microsoft Excel XML file
.xlt Template (MS Excel)
.xlw Workbook (MS Excel)
.xlx XoloX Incomplete Download file
.xm Music (Fast Tracker)
.xmi Compressed eXtended MIdi music
.xml Extensible Markup Language file
.xmp Extensible Metadata Platform
.xnf Standard Network File form
.xnk Microsoft Exchange Shortcut
.xpi XPInstall File
.xpl Music file
.xpm X11 Pixel Map graphics
.xpr Memorex CD-ROM label file
.xps XML Paper Specification file
.xpt Mozilla Firefox Component file
.xpv digital surveillance system
.xpw Leading Market Technologies EXPO
.xqt Executable file (Waffle)
.xrf Cross-reference file
.xsd XML Schema file
.xsf Milnta APL Transfer Function
.xsl Extensible Stylesheet Language file
.xspf XML Shareable Playlist file
.xss Ability Office Spreadsheet
.xtb External translation table (LocoScript)
.xtm Xtremsplit Data file
.xtr MapTool file (an add-on for UI-View)
.xul XML User Interface Language file
.xvb WinExplorer VB Script
.xvid Xvid Video file
.xvl Compact 3D file format for web apps.(Lattice 3D)
.xwd X Window System window dump image graphics (SDSC Image Tool)
.xwk Keyboard mapping (Crosstalk)
.xwp Session (Crosstalk)
.xx Compressed file ASCII archive created by XXENCODE (uuexe515.exe)
.xxe Compressed file ASCII archive created by XXENCODE (uuexe515.exe)
.xxx Singer Sewing Machine Professional SewWare file
.xy Text file (XY Write)
.xy3 Text file (XYWrite III)
.xyw Text file (XyWrite III)
.xyz ASCII RPG Maker Graphic Format
.xz XZ Compressed Archive file
.y Yacc grammar file
.y01 Secondary index (Paradox)
.y02 Secondary index (Paradox)
.y03 Secondary index (Paradox)
.y04 Secondary index (Paradox)
.y05 Secondary index (Paradox)
.y06 Secondary index (Paradox)
.y07 Secondary index (Paradox)
.y08 Secondary index (Paradox)
.y09 Secondary index (Paradox)
.yab Yabasic Source Code file
.yal Data (Arts & Letters)
.ybk Microsoft Encarta Yearbook file
.ychat Yahoo! Messenger chat log
.yenc yEnc file
.ymg Yahoo! Messenger file
.yml YAML file
.ync yEnc Encoded file
.yps Yahoo! Messenger Data file
.yuv YUV Encoded Image or Video file
.yz Compressed file archive created by YAC
.yz1 Yamazaki ZIPPER file
.z Compressed file ASCII archive created by COMPRESS (
.z01 Winzip Split Archive file
.z02 Split Archive file
.z1 ZoneAlarm Renamed VB file
.z3 Infocom game module
.zap Zero Administration Package file
.zbd Canon ZoomBrowser Database file
.zdb Zimbra Connector for Microsoft Outlook (ZCO), a plug-in for Outlook used to manage Zimbra email accounts
.zdct After Effects Language file
.zdg Compressed ZiffNet text document (Zview)
.zdl Design Pro Label file
.zdp ZDNet Password Pro 32
.zer Data file (Zerberus)
.zfx ZFX – CC3 File Packer Tool
.zgm Graphics (Zenographics)
.zhtml Secure IE Zipped HTML file
.zi Renamed Zip file
.zif Zooming Image Format file
.zip ZIP Compressed file archive
.zipx WinZip Compressed file
.zix Quicken Data file
.zl Zlib Compressed file
.zl? Zone Alarm Mailsafe Renamed File.
.zls Atlantis Ocean Mind Word Processing file
.zmc ZoneAlarm Mailsafe
.zom Compressed Amiga file archive created by ZOOM
.zon Grand Theft Auto 3 Zone file
.zoo Compressed file archive created by ZOO (zoo210.exe)
.zpk Z Firm Package file
.zpl Creative Zen Micro playlist
.zst ZSNES Slot 0 Savestate
.ztd Ziff Davis Media text database
.zvd Zyxel Voicefile (Z-Fax)
.zvz Possible Virus file
.zxp Extension Manager Package
.zz Zzip Compressed Archive file
.zzt ZZT Game Creation System
File Extension Description
NMAP Cheat Sheet with Examples