file extension Windows/OS2/Apple/Unix/Dos

File ExtensionsWindows/OS2/Apple/UNIX

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W = Ashton Tate Applause chart
W$ = Modem Bitware Fax disk3 file
W00 = Archiv
W02 = TEMP file
W20 = Windows2000 related file
W30 = Printer font (AST TurboLaser) (Ventura Publisher)
W31 = Windows 3.1 startup file
W32 = Win32 file
W3D = Black Belt Systems Ray Trace Control File
W3L = W3Launch file
W40 = Win95 Backup File
W44 = dBASE temporary file
W51 = WordPerfect 5.1 document
W60 = Mime: application/wordperfect6.0
W60 = WordPerfect 6.0 document
W61 = Mime: application/wordperfect6.1
W61 = WordPerfect 6.1 document
W64 = Wave 64 special configuration file for application(binary format) Content Type audio/wav64
W64 = Winamp.File open with: "%ProgramFiles%\Winamp\winamp.exe" "%1"
W6BN = (MAC FILE TYPE) Mac Word 6 Docu
W6BN = (MAC FILE TYPE) Microsoft Word 6 (PC ext: DOC)
W6W = Mime: application/msword
W8BN = (MAC FILE TYPE) Microsoft Word 8 (98) (PC ext: DOC)
W8TN = (MAC FILE_TYPE) Word 98 Template
W95 = Windows95 related data file
W98 = Windows98 related data file
WA0 = Magix Musstu file
WA1 = Magix Musstu file
WA8 = Audio WAV 8 bits
WA_ = Game: doko inst file
WAB = Microsoft Outlook (Address Book file)
WAC = movie format (from ??????)
WAC = NullSoft plugins for WinAmp(dll)
WAD = Programming library
WAD = texture files 3d
WAD = War Allocation Daemon (Doom - Doom2)
WAF = Temp file
WAFF = (MAC FILE_TYPE) Internet Explorer Cache
WAL = Quake 2 Texture image format
WAP = Wap application project (Ericsson WapIDE)
WAP = Wireless Bitmap (level 0) image format
WAR = Archived Konqeror (KDE) HTML Page
WARZ = (MAC FILE_TYPE) Applet Runne
WAS = movie format (from ??????)
WAS = ProComm source script
WAT = "IBM Voice Type" languages map file
WAV = Mime: application/x-wav
WAV = Mime: audio/wav
WAV = Mime: audio/x-wav
WAV = WAVe PCM Sound, standard Windows sound format
WAVE = NeroShowTime.Files.wave special configuration file for application(binary format)
WAVE = (MAC FILE_TYPE) WAVE SoundArchive Cachwav
WAX = Audio Advanced Streaming Format
WAX = Mime: audio/x-ms-wax
WAX = ProComm compiled script
WA~ = Microsoft Address Book file
WB = Game: fifa2000 be file
WB0 = Quattro Pro version 6 spreadsheet
WB1 = Mime: application/x-qpro
WB1 = Spreadsheet; Quatro Pro for Windows Notebook
WB1 = Upload file (Argo WebLoad II)
WB2 = Spreadsheet; Lotus 1-2-3 for OS/2
WB3 = Quatro Pro for Windows 7.0 Notebook
WB? = Quattro Pro spreadsheet (?=version)
WBA = Winace Zip File
WBC = Mime: application/x-webshots
WBC = Webshots image format
WBCAT = wbcatfile open with: %SystemRoot%\system32\sdclt.exe /restorepage
WBF = Windows Batch File
WBK = Ms Word auto-backup document
WBK = WordPerfect for Win WorkBooK
WBL = Argo WebLoad II upload file
WBM = Microsoft Welcome file
WBM = Wireless Bitmap (level 0) image format
WBMP = Mime: image/vnd.wap.wbmp
WBMP = Wireless Bitmap (level 0) image format
WBP = Webshots image format
WBR = Crick WordBar File
WBS = WebExpress Website File
WBT = Batch file (WilsonWare WinBatch)
WBXML = Mime: application/vnd.wap.sic
WBXML = Mime: application/vnd.wap.slc
WBXML = Mime: application/vnd.wap.wbxml
WBXML = Mime: application/vnd.wap.wmlc
WBZ = Webshots image format
WC = Mikmak 203 file
WC$ = Modem Bitware Fax disk2 file
WCD = WordPerfect for Win macro token list
WCH = Corel Office PerfectScript; see CSC
WCH = WordPerfect for Win macro facility file
WCINV = MSWinCollab open with: "%ProgramFiles%\Windows Collaboration\WinCollab.exe" -f "%1"
WCINV-MS-P2P = MSWinCollab open with: "%ProgramFiles%\Windows Collaboration\WinCollab.exe" -f "%1"
WCL = wcl2 file
WCM = Corel Presentations Macro
WCM = Terminal; MS Works Communications
WCM = WordPerfect for Windows Macro
WCP = WordPerfect for Win product information description
WCS = Chip Mark II WCS
WCT = VisualBasic WCTFile
WCX = wcxfile open with: rundll32.exe xwizards.dll,RunWizard /u {7940acf8-60ba-4213-a7c3-f3b400ee266d} /z%1
WD = InfoSelect data file
WD0 = Document WordExpress
WD1 = Document WordExpress
WD2 = Database file "Info Select" (Micro Logic)
WD_ = Databook ti file
WDB = Microsoft Works database
WDBN = (MAC FILE TYPE) Word 3/4/5 Macintosh text file (PC ext: DOC)
WDCD = (MAC FILE_TYPE) Word 5 Custom Dictionary
WDEC = (MAC FILE_TYPE) Word 6 Converter
WDEP = (MAC FILE_TYPE) Microsoft Text Converter
WDGC = (MAC FILE_TYPE) Word Converter
WDGP = (MAC FILE_TYPE) Word Add-in
WDHY = (MAC FILE_TYPE) Word Hyphenation File
WDIC = (MAC FILE_TYPE) Word 5 Plug-in
WDK = WhizFolder Desktop File
WDLL = (MAC FILE_TYPE) Word 6 Add-in
WDM = Ms Visual Interdev98 Templates Web Project Items file
WDP = IrfanView.HDP open with: "%Root%\Tools\IrfanView\i_view32.exe" "%1" PerceivedType image PerceivedType image Content Type image/
WDP = wdpfile special configuration file for application(binary format) PerceivedType image PerceivedType image Content Type image/
WDPC = (MAC FILE_TYPE) Word 6 Graphics Converter
WDT = Wintidy file
WDX9 = (MAC FILE_TYPE) Microsoft Word Wizard
WE = Game: fifa2000 be file
WEB = Corel Xara web document
WEB = Easel programming language p-code
WEB = Mime: application/vnd.xara
WEBALLOWBLOCKLIST = WebAllowBlockList_wpc open with: %SystemRoot%\system32\wpcumi.EXE /import %1
WEBOOGL = Web Object Oriented Graphics Library
WEBPNP = webpnpFile, open with: wpnpinst.exe
WEBTEST = VisualStudio.webtest.9.0 open with: "%ProgramFiles%\Microsoft Visual Studio 9.0\Common7\IDE\devenv.exe" /dde PerceivedType image PerceivedType image Content Type application/xml
WED = Windows Editor file
WF = Game: fifa2000 play file
WFA = WinFax Pro Archive
WFB = Wavepatch file
WFC = War FTP client file
WFD = sound file
WFK = Delphi Runimage Delphi Demos Doc Formdll Db file
WFL = Flowchart file (Winflow)
WFM = Database form; dBASE Form Designer
WFN = Corel vector Font
WFO = Delphi Runimage Delphi Demos Doc Formdll Db file
WFP = sound file
WFT = WaveFronT 3D object
WFW = Pci Smc file
WFX = WinFaX file
WG = Game: fifa2000 be file
WG1 = Spreadsheet; Lotus1-2-3/G worksheet
WG2 = Lotus 1-2-3 for OS/2 worksheet
WGDP = (MAC FILE_TYPE) MS Graphics Importe
WGP = Game data (Wild Board Games)
WGT = Opera.Widget open with: "%Root%\Opera\Opera.exe" "%1"
WHIP = Bitmap image (WHIP file)
WHLP = (MAC FILE TYPE) MS-Word help file
WHT = Microsoft Net Meeting White board Document
WHTT = WinHTTrackProject open with: WINHTTrack.EXE
WI = Game: fifa2000 be file
WI = Mime: image/wavelet
WIC = Garbage
WIC = J Wavelet Image Codec image format
WID = Ventura Publisher WIDth table
WIF = Image
WIF = Weaving Information Format
WIF = Window Intermediate File template
WIL = WinImage data
WIM = WAP : Wireless identity module
WIN = Mime: model/vnd.gdl
WIN = Mime: model/
WIN = Truevision Targa bitmap image
WIN = WINdow file (FoxPro/dBASE)
WIN32 = Vc6 (make-)file
WINCE EXE = Windowsce executable (palm-computers)
WINDOWS9X = Winhttrack src file
WINPOINT = Winpoint Mortgage loan file format (MS Excel format)
WINS = Makefile for WINS platform (EPOC)
WIPEINFO = Norton Utilities Sendto file
WIPESLACK = Norton Utilities Sendto file
WIS = InstallShield : Install help file
WIZ = Conjure chemical modeller input file
WIZ = Mime: application/msword
WIZ = WIZard of eg. Ms Word or Ms Publisher
WIZ = wizard pages file
WIZ! = (MAC FILE_TYPE) Microsoft Wizard
WIZHTML = accessthmltemplate open with: "%ProgramFiles%\Microsoft Office\Office10\MSACCESS.EXE"
WIZHTML = accessthmltemplate open with: "%ProgramFiles%\Microsoft Office\Office12\MSACCESS.EXE"
WJ = Game: fifa2000 be file
WK = xaa file
WK! = Lotus Spreadsheet File
WK1 = Mime: application/vnd.lotus-1-2-3
WK1 = Mime: application/x-123
WK1 = Spreadsheet; Lotus 1-2-3 2.0, Symphony
WK2 = wk2file open with: KVLOTUS.EXE
WK3 = Mime: application/vnd.lotus-1-2-3
WK3 = Spreadsheet; Lotus 1-2-3 3.0, 3.1...
WK4 = Lotus 123 version 4 spreadsheet
WK4 = Mime: application/vnd.lotus-1-2-3
WK4 = Spreadsheet; Lotus 1-2-3 4.0
WKB = WordPerfect for Win document
WKE = Spreadsheet; Lotus 1-2-3 Educational version
WKI = Lotus 1-2-3 2.x : Spreadsheet format
WKQ = Spreadsheet; (Borland Quatro, early DOS versions)
WKS = MS Works Document
WKS = Spreadsheet; Lotus 1-2-3 1 and 1A
WKS = Xlisp WorKSpace
WKZ = Mime: application/x-wingz
WKZ = Wingz spreadsheet
WLB = Wgt file
WLD = Adobe Acrobat Distiller
WLF = Argo WebLoad I upload file
WLF = Upload file (Argo WebLoad I)
WLG = DrWatson LoG file
WLK = Picture; Virtus Walk Through
WLL = MS Word Add-in; DLL
WLM = CompW image format
WLR = Virtual Reality Modeling Language for WWW
WLS = 602 pro PC SUITE Worksheet File
WLX = FileMaker Pro Plug-in
WLZ = WinImage
WM = Mime: video/x-ms-asf
WM = Windows Media
WM$ = Basic Vb file
WM3 = Working Model 3D Document
WM5 = Dyndlg2 file
WMA = Advanced Streaming Format audio
WMA = Mime: audio/x-ms-wma
WMC = Document; WordMarc
WMC = MathCad backup of startup files
WMC = WordPerfect MaCro
WMD = Windows Media Player Download Package
WMDB = WMP.WMDBFile special configuration file for application(binary format)
WMF = Mime: application/x-msmetafile
WMF = Mime: image/x-wmf
WMF = Mime: windows/metafile
WMF = Windows Metafile; vector drawing; see EMF
WMF2 = Embedded Bitmap Metafile
WMF_ = (MAC FILE_TYPE) Windows MetaFile
WMK = Oc2.316s cakit file
WML = Mime: text/vnd.wap.wml
WML = Wireless Markup Language document (WAP)
WMLC = Mime: application/vnd.wap.wmlc
WMLC = WAP : Wireless Markup Language bytecode document
WMLS = Mime: text/vnd.wap.wmlscript
WMLS = WAP : Wireless Markup Language script
WMLSC = Mime: application/vnd.wap.wmlscriptc
WMLSC = WAP : Wireless Markup Language bytecode script
WMP = Windows Magic icon Palette
WMS = WMSFile, open with: Windows Media Player /layout:"%L"
WMT = WinMount.wmt open with: %ProgramFiles%\WinMount\WinMount.exe "%1"
WMV = Audio/Video Windows Media
WMV = Mime: video/x-ms-wmv
WMX = Audio Playlist
WMX = Mime: video/x-ms-wmx
WMZ = Windows Media Player skins file
WN = NeXT WriteNow text document
WND = WinG Hidden Palette task
WNF = Outline font description (CorelDraw native format)
WNS = PrintShop Newsletter
WNT = Mumath 30 file
WOA = Windows 3.x swap file
WOB = Object file (RIO Designer Pro)
WOC = Organization (Windows OrgChart)
wock = (MAC FILE_TYPE) Route 66
WOR = ProWrite Document
WORD = (MAC FILE TYPE) Claris Works (word processor) (PC ext: CWK)
WORD = (MAC FILE TYPE) Mac Write 4.6/5
WORD = (MAC FILE TYPE) MacWrite formatted file
WORD = 2.X FOR WINDOWS Word processor-file
WORD = Mime: application/msword
work = (MAC FILE_TYPE) Mach-O Framework
WORKSPACE = Bridge.Workspace special configuration file for application(binary format) Perceived Type text Content Type text/plain
WORKSPACE = Bridge.Workspace special configuration file for application(binary format) PerceivedType image Perceived Type text Content Type text/plain
WOW = Grave Composer module (MOD) file (8 channels) (Grave Mod Player)
WP = Mime: application/wordperfect
WP = WordPerfect v4/5/6 document
WP4 = WordPerfect 4 document
WP42 = (MAC FILE TYPE) Wordperfect 4 (saved by WP for the Mac) (PC ext: WP4)
WP42 = (MAC FILE TYPE) PC WP4 file seen by Wordperfect 1 for the Mac
WP5 = Mime: application/wordperfect
WP5 = Mime: application/wordperfect6.0
WP5 = WordPerfect 5.0/5.1/5.2 document
WP50 = (MAC FILE TYPE) Wordperfect 5 (saved by WP for the Mac) (PC ext: WP5)
WP50 = (MAC FILE TYPE) PC WP51 file seen by Wordperfect 1 for the Mac
WP6 = Mime: application/wordperfect
WP6 = WordPerfect 6.0/6.1 document
WP? = WordPerfect document (?=version)
WPA = Word processor document (ACT!)
WPC = Windows 95 WordPad file converter
WPC2 = (MAC CREATOR CODE) Wordperfect 2 (3 also)
WPC2 = (MAC CREATOR CODE) WordPerfect WPC2 text
WPD = Document; PFS:WindowWorks
WPD = Mime: application/wordperfect
WPD = Mime: application/x-wpwin
WPD = Windows printer driver
WPD = WordPerfect; may be regular document or data
WPD0 = (MAC FILE TYPE) Wordperfect 1 text file
WPD0 = (MAC FILE_TYPE) WordPerfect Document
WPD1 = (MAC FILE TYPE) Wordperfect 2 text file
WPD1 = (MAC FILE_TYPE) WordPerfect 1 Document
WPD2 = (MAC FILE_TYPE) WordPerfect 2
WPD3 = (MAC FILE TYPE) Wordperfect 3 text file (what happened to the '2'?)
WPD3 = (MAC FILE_TYPE) WordPerfect 3
WPF = Enable Word Processing
WPF = Form: Informs
WPF = WordPerfect form
WPF = WorldPort Fax
WPG = WordPerfect bitmap or vector image, max. 256 colors
WPG2 = WordPerfect image
WPJ = Watcom C/C++ project
WPK = WordPerfect for Win macros
WPL = Winamp.PlayList open with: "%ProgramFiles%\Winamp\winamp.exe" "%1" Winamp_Back WMP11.AssocFile.WPL Content Type application/
WPL = WPLFile open with: "%ProgramFiles%\Windows Media Player\wmplayer.exe" /Open "%L" Content Type application/
WPL = WPLFile open with: "%ProgramFiles%\Windows Media Player\wmplayer.exe" /Open "%L" Perceived Type text Content Type application/
WPM = WordPerfect macro or Wordperfect for Mac Document
WPP = WordPerfect color Palette
WPR = WinG project file
WPR = WMS project file
WPRD = (MAC FILE TYPE) MS-Word print file
WPS = Microsoft Works document
WPT = Mime: x-lml/x-gps
WPT = WordPerfect Document Template
WPW = Novel PerfectWorks document
WPW = WordPerfect for Windows (picture/tbv)
WPX = Adobe printer description, for Postscript printing
WPZ = SkinZip : WinAmp extension installation file
WQ = Spreadsheet
WQ! = Compressed Quatro Pro spreadsheet
WQ1 = Mime: application/x-lotus
WQ1 = Spreadsheet; Quatro Pro for MS-DOS
WQ2 = Quattro Pro/DOS version 5 spreadsheet
WQ? = Quattro Pro for DOS (?=version)
WR! = Compressed Lotus Spreadsheet
WR$ = Modem Bitware Fax disk6 file
WR1 = Spreadsheet; Lotus Symphony 1.1, 1.2, 2.0
Wrap = (MAC FILE_TYPE) ShrinkWrap
WRAP = Windows Mediaforge
WRD = Charisma template
WRD = Psion Series 3 text document
WRG = ReGet document
WRI = Mime: application/mswrite
WRI = Mime: application/x-mswrite
WRI = Mime: application/x-wri
WRI = Windows Write Document
WRK = Spreadsheet; Lotus Symphony 1, 1.01
WRL = Live3D Plug-in for Netscape 3D live picture; see WRZ
WRL = Mime: application/x-world
WRL = Mime: i-world/i-vrml
WRL = Mime: model/vrml
WRL = Mime: x-world/x-vrml
WRL = VRML Worlds (Virtual Reality Modelling Language) (Cosmo Player)
WRP = Compressed Amiga file archive (Warp)
WRS = Windows Resource eg. printer driver (WordPerfect for Win)
WRT = Write text
WRZ = Live32 Geometry for Netscape
WRZ = Mime: model/vrml
WRZ = Mime: x-world/x-vrml
WRZ = VRML Worlds (Virtual Reality Modelling Language) (Cosmo Player)
WS = APL Worksheet
WS = Windows Script file
WS = WordStar 5.0/6.0 document
WS1 = WordStar for Windows 1.x document
WS2 = Document; WordStar 2000
WS3 = WordStar for Windows 3 document
WS4 = WordStar for Windows 4 document
WS5 = WordStar for Windows 5 document
WS6 = WordStar for Windows 6 document
WS7 = WordStar for Windows 7 document
WS? = WordStar for Windows (?=version)
WS_ = Visc15 Adressen Setup file
WSB = MSWorks7Portfolio special configuration file for application(binary format)
WSC = Mime: text/scriptlet
WSC = Mime: text/sgml
WSC = RIO Designer Pro scene file
WSC = Windows scripting component file
WSD = WordStar 2000 document
WSE = Wise File
WSET = (MAC FILE_TYPE) Word Settings
WSF = windows scripting file (vbscript..)(formerly .ws .js .vbs)
WSH = Windows Scripting Host
WSP = Fortran PowerStation workspac
WSP = old Workspace Info (MS Visual C++, Fortran)
WSQ = Wavelet-packet Scalar Quantization bitmap
WSRC = Mime: application/x-wais-source
WSRC = x-wais source
WSS = Windows Sound System
WST = Document; WordStar
WSX = Audio Utility Sysex Wsysex file
WSZ = Winamp Skin Zip
WT0 = Template WordExpress ( assistant )
WTA = WinTune DLL
WTB = Mime: application/vnd.webturbo
WTBN = (MAC FILE TYPE) Word Template
WTBN = (MAC FILE TYPE) Word Template (PC ext: DOT)
WTBN = (MAC FILE_TYPE) Word 4/5 Template
WTD = WinTune Document (database of test results, binary)
WTF = Weird wally screen saver editor file
WTK = Mime: application/x-wintalk
WTK = URL address of person to talk to (WinTalk)
WTMP = (MAC FILE_TYPE) Word 5 Temp File
WTR = Winter Windows scheduler file
WTS = Ntgraph Qwknetv1 file
WTV = MediaCenter.WTVFile special configuration file for application(binary format) PerceivedType video PerceivedType video
WTX = Mime: text/plain
WTX = WinTune Export document
WUL = Wincmd file
WV = Mime: video/wavelet
WVD = Starmoney Filter Zvl32 file
WVE = Psion (palmtop) A-law .WVE files
WVE = Sound (8kHz) (Psion Series 3)
WVL = Wavelet Bitmap Picture
WVW = Interleaf WorldView format (a PDF format)
WVX = Audio/Video Windows Media
WVX = Mime: video/x-ms-wvx
WVY = Pub
WW4 = WinWhatWhere activity log
WWB = WordPerfect button bar
WWD = Microsoft Works Wizards file
WWK = WordPerfect keyboard layout
WWL = Microsoft Word add-in file
WWP = Microsoft Works Wizards file
WWS = Microsoft Works Wizards file
WWW = abbrev. for World Wide Web
WXD = Music resource file (Relic Entertainment)(Home World)
WXL = Mime: application/x-wxl
WXP = document EXP for Windows
WXR = wxclips resource file
WXS = Easy Cross Software files (
WXS = QuotesNows! data file
WZD = Sharp Organizer Program or Data File
WZN = WhizFolder Document
WZS = MS Word Wizard
WZZ = IGS setup internet account

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Universal dump-utility for non-destructive dump/list/search string etc

Select Extension by starting letter:

A- B - C - D - E - F - G - H - I - J - K - L - M - N - O - P - Q - R - S - T - U -

V- W - X - Y - Z - OTHER - Allowed chars in Filenames - what is an extension?


If you find an extension missing, write! No guarantee given for completeness or correctness. If you feel an extension is outdated, write!
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Any questions for not listed extensions or "what program opens xxx":
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Compilation Copyright (c) 2002 R.Bitsch, Compilation Copyright (c) 2009,2010 R.Cooper-Bitsch