| .w | OpenEdge Architect Source Code Format |
| .w01 | Yamaha Dog Audio Sample Format |
| .w02 | Yamaha Cat Audio Sample Format |
| .w03 | Yamaha Pig Audio Sample |
| .w04 | Yamaha Cattle Audio Sample |
| .w05 | Yamaha Horse Audio Sample |
| .w06 | Yamaha Lion Audio Sample |
| .w07 | Yamaha Elephant Audio Sample |
| .w08 | Yamaha Goat Audio Sample |
| .w09 | Yamaha Sea-lion Audio Sample |
| .w20 | Windows 2000 Related |
| .w2a | Yamaha Motif All Format |
| .w2d | Autodesk Design (Drawing) Web Format 2D |
| .w2e | Motif Rack ES Voice Editor |
| .w2m | Solo Explorer Transcription |
| .w2p | Webit |
| .w2v | Yamaha Motif Voices Format |
| .w2w | Yamaha Motif Waveforms Format |
| .w30 | Ventura Publisher Printer Font |
| .w31 | Windows 3.1 Startup |
| .w32 | WinCAPs Subtitle Format |
| .w3d | Adobe Shockwave 3D Scene Export Format |
| .w3e | Motif Rack ES Voice Editor |
| .w3g | Blizzard Warcraft III Game Replay Format |
| .w3i | Warcraft III Map Related |
| .w3l | W3launch |
| .w3m | Warcraft 3 Map Format |
| .w3n | Warcraft 3 Frozen Throne Campaign Format |
| .w3p | Warcraft 3 Progress |
| .w3u | Warcraft 3 Custom Units |
| .w3v | Warcraft 3 Campaign Progress Record |
| .w3x | Blizzard Warcraft III Expansion Map Format |
| .w3z | Blizzard Warcraft III Saved Game Format |
| .w40 | Windows 95 Backup Format |
| .w44 | DBASE Temporary |
| .w4a | Audio |
| .w51 | Corel WordPerfect 5.1 Document |
| .w5s | Winamp CDDB Database |
| .w60 | Corel WordPerfect 6.0 Document |
| .w61 | Corel WordPerfect 6.1 Document |
| .w64 | Sonic Foundry Wave-64 Format |
| .w6bn | Microsoft Word 6 For Mac Document |
| .w6e | Motif Rack ES Voice Editor |
| .w6w | Microsoft Word 6 Document |
| .w7a | Yamaha Motif ES Format |
| .w7e | Motif Rack ES Voice Editor |
| .w7v | Yamaha Motif ES Voices Format |
| .w7w | Yamaha Motif ES Waveforms |
| .w8bn | Microsoft Word 98 For Mac Document |
| .w8e | Motif Rack ES Voice Editor |
| .w8tn | Microsoft Word 98 For Mac Template |
| .w8v | Yamaha Motif ES Sample Data |
| .w95 | Windows 95 Data |
| .w98 | Microsoft Windows 98 Related Data |
| .w9e | Motif Rack ES Voice Editor |
| .w?? | Yamaha SY-series And TX16W Wave |
| .wa! | GigaStudio/GigaSampler Compressed Wave |
| .wa0 | Magix Music Studio |
| .wa2 | Wonderland Adventures Custom Game Format |
| .wab | Microsoft Windows Address Book Format |
| .wac | WISCO Accounts Storage |
| .wad | Doom Wad Format |
| .waf | Microsoft Internet Explorer For Mac Cache |
| .waff | IE Saved Web Page |
| .wag | Train Simulator Wagon |
| .wagame | Worms Armageddon Game Replay |
| .wai | Warcraft 3 AI Data |
| .waj | WinAutomation |
| .wal | Winamp 3 Skin Format |
| .wand | Apple GarageBand Project Format |
| .wap | Wireless Bitmap (level 0) Image Format |
| .war | Java Web Archive Format |
| .wat | IBM Voice Type Languages Map |
| .wav | WAVe PCM Sound, Standard Windows Sound Format |
| .wave | WAVe PCM Sound Format |
| .wax | Windows Media Audio Redirector Format |
| .wa~ | Microsoft Address Book |
| .wb | Apple Logic Studio WaveBurner Document |
| .wb0 | Corel Quattro Pro Spreadsheet |
| .wb1 | Corel Quattro Pro Spreadsheet Format |
| .wb2 | Corel Quattro Pro Spreadsheet Format |
| .wb3 | Corel Quattro Pro Spreadsheet Format |
| .wb4 | WindowBlinds Default Skin |
| .wb? | Corel Quattro Pro Spreadsheet |
| .wba | WindowBlinds Desktop Visual Style |
| .wbb | WinBackup Backup Format |
| .wbc | Webshots Collection Image Format |
| .wbcat | Microsoft Windows Backup Information Format |
| .wbd | Microsoft Works Database Format |
| .wbdp | ANSYS Workbench Project Global |
| .wbf | Microsoft Windows Batch |
| .wbfs | Nintendo Wii Backup Format System Format |
| .wbk | Microsoft Word Auto-backup Document Format |
| .wbm | Wireless Bitmap Image Format |
| .wbmp | Wireless Bitmap Image Format |
| .wbo | DataFlex Web Business Object |
| .wbp | Webshots Image |
| .wbpj | ANSYS Workbench Project |
| .wbpz | ANSYS Update Package |
| .wbs | WebExpress Website |
| .wbt | WinBatch Script Format |
| .wbu | Samsung PC Studio Backup |
| .wbverify | Microsoft Windows Backup |
| .wbx | Webshots |
| .wbxml | WAP Binary XML Format |
| .wbz | Webshots Image Format |
| .wc | Total Commander File Tree Info |
| .wcat | WinCatalog Collection Format |
| .wcd | Microsoft Works Calendar Format |
| .wcf | WebEx Saved Chat Session Format |
| .wch | Corel WordPerfect Macro Facility |
| .wcinv-ms-p2p | Windows Meeting Space |
| .wck | WaterCAD |
| .wcl | WellCAD Log |
| .wcm | Microsoft Works Communications Script Format |
| .wcp | WinDVD Creator Project Format |
| .wcpl | Webcopier Project Settings |
| .wcst | Wirecast Document |
| .wct | WordCast Project |
| .wcx | Total Commander Plug-in |
| .wcxf | WorldCard Exchange |
| .wcz | Chameleon Clock Wallpaper Format |
| .wd | Earth 2140-2160 Game Archive |
| .wd0 | WordExpress Document |
| .wd1 | WordExpress Document |
| .wd2 | Info Select Database |
| .wd3 | Offline Explorer Directory Index Format |
| .wdb | Microsoft Works Database Format |
| .wdbn | Microsoft World For Mac Document |
| .wdcd | Word 5 For Mac Custom Dictionary |
| .wdd | AutoCAD Electrical Description List |
| .wdf | Microsoft Windows Driver Foundation Format |
| .wdgp | Word For Mac Add-in |
| .wdgt | Apple Mac OS X Dashboard Widget |
| .wdgtproj | Dashcode Widget Project |
| .wdi | WINDEV Component Description |
| .wdic | Word 5 For Mac Extension |
| .wdk | WINDEV Component |
| .wdl | World Definition Language Script |
| .wdll | Word 6 For Mac Add-in |
| .wdm | BASINS Meteorological Database |
| .wdn | AutoCAD Electrical Project-related |
| .wdoc | WriteOnline Document |
| .wdp | Windows Media HD Photo |
| .wdproj | Microsoft Visual Studio Web Deployment Project |
| .wdq | WDQ Offline Explorer Queue Format |
| .wdr | Star Wars: Tie Fighter Media |
| .wdseml | Mozilla Thunderbird Mail Message Format |
| .wdt | WinSQL Schema Diff Template |
| .wdv | TracePlus Web Detective |
| .wdw | WINDEV Window Format |
| .wdx | Total Commander Content Plugin |
| .wdx9 | Microsoft Word For Mac Wizard |
| .wdy | WINDEV Run-time Template |
| .we | Fifa2000 Be Game |
| .we? | Standard Mail Archive |
| .wea | Ecotect Weather Format |
| .weap | Quake 3 Id Tech 3 Game Engine Weapon Format |
| .web | Xara Web Document Format |
| .weballowblocklist | Windows Vista Parental Control Settings |
| .webarchive | Apple Safari Web Archive Format |
| .webarchivexml | Android 3.1 Browser Saved Website Format |
| .webbookmark | Apple Safari Bookmark Format |
| .webdoc | Box Service Document Format |
| .webhistory | Apple Safari History Item Format |
| .webinar | GoToWebinar Session |
| .webinfo | Visual Studio .NET |
| .webintents | Webintents |
| .webloc | Apple Mac OS X Finder Internet URL |
| .webm | Matroska WebM Video Format |
| .weboogl | Web Object Oriented Graphics Library |
| .webp | WebP Image |
| .webpart | Microsoft SharePoint Web Part |
| .webpnp | Web Point And Print Format |
| .webpublishhistory | Alpha Five |
| .websettings | JEE2 Web Project Settings |
| .website | Internet Explorer 9 Pinned Site Shortcut Format |
| .webtemplate | Apple IWeb Template Format |
| .webtest | Microsoft Visual Studio Web Test |
| .webtestresult | Microsoft Visual Studio Web Test Result |
| .webtheme | Apple IWeb Theme Format |
| .webz | Web Format Compressed EBook Format |
| .wed | BioWare Infinity Game Engine Graphic Display Info |
| .wef | Exchange File System Format |
| .weightoutput | SAM Sequence |
| .weights | SAM Sequence Weights |
| .wem | Wwise Encoded Media Audio Format |
| .wep | EPublisher Stationery Design Project |
| .wer | Microsoft Windows Application Error Report |
| .wet | WinSQL Export Template |
| .wf | FIFA 2000 Play |
| .wf1 | EViews Work |
| .wf4 | Creo Parametric Symbol |
| .wfb | Turtle Beach WaveFront Bank Format |
| .wfc | Windows Wireless Network Settings Format |
| .wfd | Turtle Beach WaveFront Drum Set Format |
| .wff | Dataplore Wavelet Filter |
| .wfk | Delphi |
| .wfl | Offline Design For Workflow Process |
| .wflow | Apple Mac OS X Automator Workflow |
| .wfm | DBASE Form Format |
| .wfo | Delphi Runimage |
| .wfp | Turtle Beach WaveFront Audio Format |
| .wfs | Microsoft Windows Installation Script |
| .wft | GTA 4 Car Model Format |
| .wfv | DataSet Vision Query Report |
| .wfw | Windows Firewall Policy Export |
| .wfx | WinFax |
| .wg | Fifa 2000 Game |
| .wg1 | Lotus 1-2-3 Worksheet |
| .wg2 | Lotus 1-2-3 For OS/2 Worksheet |
| .wgameprofile | X-Men Origins: Wolverine Profile |
| .wgf | Widelands Game Format |
| .wgn | SWAT Wather Generator Input |
| .wgom | CompeGPS Land Google Earth Remote Map |
| .wgp | Web Gallery Project Format |
| .wgs | Walk-Graph Segment |
| .wgt | Opera Widgets Format |
| .wgz | S60 Web Runtime Widget Package Format |
| .whb | Apple IPod Backup Image |
| .whd | Hitman Game Archive |
| .whirld | Unity Whirld Format |
| .whlp | Microsoft Word For Mac Help |
| .whm | Warhammer 40,000: Dawn Of War Model |
| .wht | Microsoft NetMeeting White Board Document |
| .whtt | WinHTTrack Project |
| .wi | Wavelet Compressed Image Format |
| .wia | Nintendo Wii ISO Archive |
| .wic | J Wavelet Image Codec Image Format |
| .WiCSaveGame | World In Conflict Saved Game |
| .wid | Corel Ventura Publisher Width Table Format |
| .widget | Yahoo! Widget Format |
| .wif | Weaving Information Format |
| .wiff | AB SCIEX Windows Interchange File Format |
| .wii | Nintendo WII Raw Disk Image Format |
| .wiki | Wiki Markup Source |
| .wil | WinImage Data Format |
| .wim | Windows Imaging Format Archive Format |
| .wimp | Microsoft Windows Icon Palette |
| .win | Windows Backup Format |
| .win32manifest | Microsoft Win32 Manifest |
| .wince | Microsoft Windows CE Program Executable |
| .winclone | Winclone Disk Image Format |
| .windowslivecontact | Microsoft Live Messenger Format |
| .windowslivegroup | Windows Live Mail |
| .winmd | Windows Runtime Metadata Output |
| .wip | CyberScrub Privacy Suite Wipe |
| .wipeinfo | Norton Utilities Sendto |
| .wipeslack | Norton Utilities Sendto |
| .wiq | Microsoft Visual Studio Format |
| .wire | Wavefront Studio Wireframe |
| .wis | InstallShield Install Help |
| .wit | WebIdeaTree Project |
| .wix | Xara Internal Graphics Data |
| .wixlib | WiX Library |
| .wixmsp | WiX XML Patch |
| .wixmst | WiX Transform |
| .wixobj | WiX Object |
| .wixout | WiX XML Output |
| .wixpdb | WiX Debug |
| .wixproj | WiX Windows Installer XML Project |
| .wiz | Microsoft Office Wizard Format |
| .wizhtml | Microsoft Access HTML Template |
| .wj | Fifa 2000 Game |
| .wje | WinJournal Entry Format |
| .wjf | WinZip Job Format |
| .wjr | ReGet Deluxe Data Format |
| .wk! | Lotus 1-2-3 Spreadsheet |
| .wk1 | Lotus 1-2-3 Version 2.x Spreadsheet Format |
| .wk2 | Lotus 1-2-3 Version 2 Spreadsheet Format |
| .wk3 | Lotus 1-2-3 Version 3.x Spreadsheet Format |
| .wk4 | Lotus 1-2-3 Version 4.x Spreadsheet Format |
| .wk5 | Lotus 1-2-3 Version 5 Spreadsheet Format |
| .wkb | Corel WordPerfect Document |
| .wke | Lotus 1-2-3 Educational Version Spreadsheet Format |
| .wkf | KF Web Server Default Control |
| .wki | Lotus 1-2-3 Version 2 Spreadsheet Format |
| .wkp | Web CEO Database Backup |
| .wkq | Corel Quattro Pro For MS-DOS Spreadsheet |
| .wks | Microsoft Works Spreadsheet Document Format |
| .wkt | Garmin Training Schedule |
| .wku | Lotus 1-2-3 Spreadsheet Format |
| .wkz | Wingz Spreadsheet |
| .wl | WISCO Word Power Word Lists And Definitions |
| .wl1 | Wolfenstein 3D Shareware Version Format |
| .wl3 | Wolfenstein 3D Registered Version |
| .wl6 | Wolfenstein 3D Registered Version Format |
| .wlc | Microsoft Live Mesh |
| .wld | ArcView CAD Datasets World Format |
| .wlf | Microsoft Windows Dr. Watson Log |
| .wlg | Well Logger V1 |
| .wlk | Weatherlink Data |
| .wll | Microsoft Word Add-in Format |
| .wlm | CompW Image Format |
| .wlmp | Microsoft Windows Live Movie Maker Video Project Format |
| .wlp | Worldlabel.com Label Designer Format |
| .wls | 602Tab Document |
| .wlt | Words Of Worship |
| .wlx | FileMaker Pro Plug-in |
| .wlz | WinImage Format |
| .wm | Windows Media Audio Or Video Format |
| .wm2d | Working Model 2D Data |
| .wm3 | VisualNastran Movie |
| .wma | Windows Media Audio |
| .wmb | 3D GameStudio Map Entity |
| .wmc | Corel WordPerfect Macro |
| .wmd | Windows Media Player Download Package |
| .wmdb | Windows Media Player Database Format |
| .wme | Microsoft Windows Media Encoder Session Profile |
| .wmf | Windows Metafile Format |
| .wmg | SecureDoc Encrypted Hard Drive Control |
| .wmga | Web Manga Comics Document Format |
| .wmi | WorldMate Itinerary Data |
| .wmk | WebMake Documentation Source |
| .wml | Wireless Markup Language Document (WAP) |
| .wmlc | Wireless Markup Language Bytecode Document (WAP) |
| .wmls | Wireless Markup Language Script File (WAP) |
| .wmlsc | Wireless Markup Language (WAP) Bytecode Script |
| .wmmp | Windows Movie Maker Project Format |
| .wmn | DART Pro 98 Playlist |
| .wmo | World Of Warcraft WoW Map Object |
| .wmp | Microsoft Windows Media HD Photo Format |
| .wmr | Windows Media Recorder |
| .wms | Windows Media Player Skins |
| .wmt | WinMount Format |
| .wmu | WIND Tunnel WIND |
| .wmv | Windows Media Video Format |
| .wmv3 | Video |
| .wmw | Likno Web Modal Windows Builder |
| .wmx | Windows Media Redirector |
| .wmz | Windows Media Player Compressed Skins Format |
| .wn | NeXT WriteNow Text Document |
| .wna | WIND Tunnel Assignment |
| .wnd | SWAT Wind Speed Input |
| .wnf | CorelDRAW Outline Font Description |
| .wnk | Wink Screen Capture Format |
| .wnt | Soldier Of Fortune II Waypoint |
| .wnu | WIND Tunnel UMTS Measurement Data |
| .wo | DataFlex Web Object |
| .woa | WebObjects Script Format |
| .wock | Route 66 For Mac |
| .wod | Apple WebObjects Web Application Method |
| .woff | Web Open Font Format Package Format |
| .wog | WAsP Obstacle Group |
| .wolf | WOLF Document |
| .wolfquest | WolfQuest Saved Game |
| .woo | Apple WebObjects |
| .wop | Wonderland Adventures Object Preset Format |
| .wor | MapInfo Workspace Format |
| .word | MacWrite Document |
| .wordlist | Desktop Poet Word List Format |
| .work | Bibble Work Queue Format |
| .workflow | Mac OS X Automator Format |
| .worksheet | BBEdit Shell Worksheet Format |
| .workspace | Adobe Applications Workspace Setting |
| .world | WorldPainter Minecraft Map Format |
| .wos | Words Of Worship Output Settings |
| .wot | Web Of Trust Format |
| .wotreplay | World Of Tanks Battle Recording Format |
| .wov | Cakewalk SONAR Cache Clip |
| .wow | Grave Composer Module Format |
| .wowpreplay | World Of Warplanes Replay |
| .wowproj | AddOn Studio For World Of Warcraft Project Format |
| .wowsl | WOW Slider Plugin |
| .wp | WordPerfect Document Format |
| .wp1 | MODAWEC Output Data |
| .wp2 | Winplot |
| .wp3 | Microsoft Photo Story Project Format |
| .wp4 | Corel WordPerfect 4 Format |
| .wp42 | Corel WordPerfect 4 For Mac Document |
| .wp5 | WordPerfect 5 Document Format |
| .wp50 | Corel WordPerfect 5 For Mac Document |
| .wp6 | Corel WordPerfect 6 For Mac Document Format |
| .wp7 | WordPerfect 7 Document Format |
| .wp? | Corel WordPerfect Document |
| .wpa | ACT! Word Processor Document Format |
| .wpb | Windows Phone Device Manager Backup Format |
| .wpc | Microsoft Word And Write Windows 95 WordPad Format Converter Format |
| .wpc2 | Corel WordPerfect 2/3 For Mac Document |
| .wpd | Corel WordPerfect Document Format |
| .wpd0 | Corel WordPerfect 1 For Mac Document |
| .wpd1 | Corel WordPerfect 1 For Mac Document |
| .wpd2 | Corel WordPerfect 2 For Mac Document |
| .wpd3 | Corel WordPerfect 3 For Mac Document |
| .wpe | OpenCanvas Record Format |
| .wpf | Corel WordPerfect Form Format |
| .wpg | Corel WordPerfect Graphic Format |
| .wpg2 | Corel WordPerfect Image |
| .wph | WAsP Project Format |
| .wpj | Microsoft Works Wizard |
| .wpk | Corel WordPerfect Macro Format |
| .wpl | Microsoft Windows Media Player Playlist Format |
| .wpm | Corel WordPerfect Macro Format |
| .wpn | Schedule24 Schedule |
| .wpo | Holux MapShow Format |
| .wpost | Microsoft Windows Live Writer Post Format |
| .wpostx | Microsoft Windows Live Writer Post |
| .wpp | Corel WordPerfect Color Palette Format |
| .wpr | Apple Logic Studio WaveBurner Plug-in Preset |
| .wprd | Microsoft Word For Mac Print |
| .wproj | Wwise Project |
| .wps | Microsoft Works Document Format |
| .wpt | Corel WordPerfect Document Template Format |
| .wpw | Corel WordPerfect Document Format |
| .wpx | Adobe Printer Description For Postscript Printing Format |
| .wpz | WinAmp SkinZip |
| .wq! | Corel Quattro Pro Compressed Spreadsheet |
| .wq0 | Corel Quattro Pro For MS-DOS Spreadsheet |
| .wq1 | Corel Quattro Pro For MS-DOS Spreadsheet Format |
| .wq2 | Corel Quattro Pro For MS-DOS Spreadsheet Format |
| .wq? | Corel Quattro Pro For MS-DOS Spreadsheet |
| .wql | Microsoft Office |
| .wr! | Compressed Lotus Spreadsheet |
| .wr1 | Lotus Symphony Spreadsheet |
| .wrap | ShrinkWrap MAC |
| .wrapper | Gnome Desktop |
| .wrc | FreeArc Archive |
| .wrd | COREX Manually Verified Word Segmentation |
| .wrf | WebEx Recording Format |
| .wrg | WAsP Resource Grid |
| .wri | Windows Write Document Format |
| .wrk | Cakewalk Music Project Format |
| .wrl | VRML Worlds Format |
| .wrlk | Web Research Document Link |
| .wrm | WinRAdiO Memory Format |
| .wrp | Geomagic 3D Wrap Format |
| .wrpl | Widelands Saved Game Format |
| .wrpl.wgf | Widelands Initial Saved Game Format |
| .wrr | WAsP Roughness Rose |
| .wrs | Corel WordPerfect Windows Printer Driver |
| .wrz | Cosmo Player VRML Worlds |
| .ws | Microsoft Windows Script Format |
| .ws1 | WordStar For Windows 1 Document |
| .ws2 | WordStar 2000 Document |
| .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 Document |
| .wsa | Corel PaintShop Photo Pro Animation Shop Workspace |
| .wsb | Microsoft SharePoint Server 2007 Temporary |
| .wsc | Microsoft Windows Scripting Component Format |
| .wsd | WordStar 2000 Document |
| .wsdd | Apache Axis Web Service Deployment Descriptor (WSDD) |
| .wsdl | Microsoft Visual Studio Web Service Description Language Format |
| .wse | Wise File Format |
| .wset | Microsoft Word For Mac Settings |
| .wsf | Microsoft Windows Scripting Format |
| .wsg | WAsP Site Locations |
| .wsh | Microsoft Windows Scripting Host Format |
| .wsi | Wise Windows Installer Project Format |
| .wsil | IBM Web Services Inspection Language |
| .wsk | Whisset Media Player Skin |
| .wsl | Win-Situ Data Logger |
| .wsm | Symantec Wise Package Studio Merge Module Format |
| .wsmdi | Microsoft Visual Studio Test List |
| .wso | Sims 3 Mesh |
| .wsp | Microsoft Windows SharePoint Services Solution Framework Format |
| .wspak | WebsitePanel Backup Format |
| .wsq | UTAU |
| .wsr | Crossword Genius |
| .wss | Microsoft Windows Sound System |
| .wssp | CommuniGate Custom Website Definition |
| .wsstyles | Microsoft Windows Vista Sidebar Style |
| .wst | NextSTART Theme |
| .wsv | Konica Minolta SpectraMagic Data |
| .wsw | WorkShelf Theme |
| .wsx | SysEx Librarian For Mac OS X |
| .wsym | ArchiCAD For MAC Geometric Description Language |
| .wsz | Winamp Skin Zip Format |
| .wt0 | WordExpress Template |
| .wt6 | 602Pro PC Suite Extension |
| .wta | WinTune DLL Dynamic Link Library |
| .wtb | Win-Test Binary Log Format |
| .wtbn | Word For Mac Template |
| .wtc | Logitech Web Camera Format |
| .wtd | Grand Theft Auto IV Textures Format |
| .wtf | World Of Warcraft Server Configuration Text Format |
| .wtfav | Watchtower Library Favourite |
| .wtg | WAsP Wind Turbine Generator |
| .wth | ContamX Weather |
| .wti | WebTranslateIt Configuration |
| .wtk | WinTalk URL Address |
| .wtl | Windows Test Log |
| .wtmp | Microsoft Word For Mac 5 Temporary |
| .wtp | Wink Template |
| .wtpl | WireTap Studio Library |
| .wtpt | WireTap Studio Packaged Track |
| .wtr | Microsoft Encarta Format |
| .wts | WebPlus Template |
| .wtt | Likno Web/HTML Tooltips Builder |
| .wtv | Microsoft Windows Media Center Recorded Television Format |
| .wtx | WinTune Export Text Document Format |
| .wui | WhatsUp Gold Network Map Polling Statistics |
| .wul | WinUHA Language Format |
| .wup | WhatsUp Gold Network Map |
| .wus | WUTG Tagged Audio Format |
| .wusiksnd | Wusik Station Multisampled Sound |
| .wut | WUTG Editor Tag Format |
| .wv | WavPack Lossless Compressed Audio Format |
| .wvc | WawPack Lossless Compressed Audio Format Format Correction Format |
| .wvd | StarMoney Filter Zvl32 |
| .wve | DivX Movie Conversion Component Format |
| .wvl | Wavelet Bitmap Format |
| .wvm | WAVE Input |
| .wvp | Symantec Virtual Package Editor Virtual Software Project Format |
| .wvx | Windows Media Video Redirector Format |
| .wvxml | AudioPlayer XML Playlist |
| .ww6 | Nolo Willmaker 6 Will |
| .wwa | WebSite-Watcher Archive |
| .wwb | Corel WordPerfect Button Bar |
| .wwcx | Adobe InCopy |
| .wwd | Microsoft Works Wizards Format |
| .wwf | WWF Rant Pakk Sound Format |
| .wwg | CARE-S InfoWorks Wastewater Data |
| .wwh | WAsP Workspace |
| .wwk | Corel WordPerfect Keyboard Layout |
| .wwl | Microsoft Word Add-in |
| .wwp | Microsoft Works Wizards |
| .wwq | SWAT Watershed Water Quality Input |
| .wwr | WAsP Resource Grid |
| .wws | Writing With Symbols Document |
| .wwt | WinDev Page Template |
| .wwu | Wwise Work Unit Format |
| .wx | Flight Simulator Weather Format |
| .wxd | Homeworld Musc Resource Game |
| .wxf | WinSQL Scheduled Task |
| .wxi | WiX Include |
| .wxl | WiX Localization |
| .wxmx | WxMaxima Document |
| .wxp | EXP For Windows Document |
| .wxr | WxWindgets Resource |
| .wxs | Code::Blocks XML |
| .wyc | WyBuild Version Number |
| .wyp | WyBuild Definitions |
| .wys | WyBuild Server |
| .wyu | WyBuild Update |
| .wyz | WYZTracker Format |
| .wz | MapleStory Game Data Archive |
| .wza | Encryption Wizard Archive |
| .wzconfig | WinZip E-mail Configuration Format |
| .wzmul | WinZip Multi-user Registration Format |
| .wzn | WhizFolders Document |
| .wzs | Microsoft Word Wizard |
File extensions are not normally displayed to users. To change this, go to Control Panel, select Appearance and Personalization and Folder Options. Next, select the View and find the option "Hide extensions for known file types". The option should be deselected (cleared) and confirmed with OK.
