W
| Ext. | Description | Used by |
|---|---|---|
| W | Word chart file | APPLAUSE |
| W01 | Yamaha SY-series wave files | AWAVE |
| W01 | Yamaha TX16W wave file | AWAVE |
| W30 | Printer font | AST TurboLaser - Ventura Publisher |
| W31 | Startup file | Windows 3.1 |
| W3A | Warcraft III Abilities Export File | Contained in a Warcraft III map |
| W3B | Warcraft III Destructables Export File | Contained in a Warcraft III map |
| W3D | Warcraft III Doodads Export File | Contained in a Warcraft III map |
| W3D | Westwood 3D object format | 3D models used in Renegade and Generals |
| W3D | Shockwave 3D object format | |
| W3G | Warcraft III Replay File | File for Warcraft III |
| W3H | Warcraft III Buffs Export File | Contained in a Warcraft III map |
| W3M | Warcraft III Map | File for Warcraft III: Reign of Chaos |
| W3N | Warcraft III Campaign | File for Warcraft III: The Frozen Throne |
| W3O | Warcraft III Object Data Export File | Contained in a Warcraft III map |
| W3P | Warcraft III Save | Save File for Warcraft III |
| W3Q | Warcraft III Upgrades Export File | Contained in a Warcraft III map |
| W3T | Warcraft III Item Export File | Contained in a Warcraft III map |
| W3U | Warcraft III Unit Export File | Contained in a Warcraft III map |
| W3V | Warcraft III Save | Save File for Warcraft III |
| W3X | Warcraft III Expansion Map | File for Warcraft III: The Frozen Throne |
| W3Z | Warcraft III Save | Save File for Warcraft III |
| W40 | renamed system files (AUTOEXEC.BAT,COMMAND.COM,CONFIG.SYS,DBLSPACE.BIN.DRVSPACE.BIN,MSDOS.SYS) of previous MS-DOS version | Windows 95,98,ME (dual-boot feature) |
| W44 | Temporary file for Sort or Index | dBASE |
| W95 | Something for Windows95 | Win95 |
| WAD | Where's All the Data? | Doom - Doom2 |
| WAD | Nintendo proprietary format for Wii channels, menus, etc. | Nintendo Wii |
| WAG | Yard Contents File | FYM |
| WAI | Warcraft III AI Data File | Warcraft III AI Data File |
| WAR | Java Web Archive | A Java file format used to package and deploy web applications |
| WAS | ProComm Script File (source code) | ProComm |
| WAV | Sound format (Microsoft Windows RIFF WAVE) | Media Player |
| WAX | TVTonic WAX video packaging | Wavexpress TVTonic |
| WAX | ProComm compiled script | ProComm |
| WAX | Windows Media Audio Shortcut | Windows Media Player |
| WB1 | Notebook | Quattro Pro |
| WB2 | Spreadsheet | Quattro Pro |
| WBF | Microsoft Windows Batch File | Catch |
| WBK | Document/workbook or Microsoft Word backup file | WordPerfect for Win or Microsoft Word |
| WBT | Norton Desktop | Norton Desktop |
| WBT | Wilsonware Batch file | Winbatch |
| WCD | Condes Event Data file | Condes |
| WCD | Macro token list | WordPerfect for Win |
| WCH | WordPerfect Macro Facility | WP |
| WCM | Data transmission file | Microsoft Works |
| WCM | Macro | WordPerfect for Win |
| WCP | Product information description | WordPerfect for Win |
| WD | InfoSelect Data file | |
| WDB | Database | Microsoft Works |
| WDM | Admin tool connection definition | War FTP |
| WE? | Packed mail | FTN software |
| WEB | WEB source code file | Web Easy Professional |
| WebOOGL | Web Object Oriented Graphics Library | |
| WFB | Turtle Beach WaveFront Bank | AWAVE |
| WFD | Turtle Beach WaveFront Drum | AWAVE |
| WFM | Form object | dBASE Form Designer |
| WFN | Font | CorelDRAW |
| WFP | Turtle Beach WaveFront Prog. | AWAVE |
| WFT | Web Family Tree | GRAMPS |
| WFX | Data file | Winfax |
| WG1 | Worksheet | Lotus 1-2-3/G |
| WG2 | Worksheet | Lotus 1-2-3 for OS/2 |
| WID | Width table | Ventura Publisher |
| WIM | Windows Imaging Format | ImageX |
| WIN | Window file | FoxPro - dBASE |
| WIREFRAME | Data | EMSE mesh |
| WIX | Windows Installer XML | WiX |
| WIZ | Page wizard | Microsoft Publisher |
| WK1 | Spreadsheet | Lotus 1-2-3 version 2.x - Lotus 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 | Spreadsheet | Lotus 1-2-3 educational version |
| WKF | VISI Working file | Vero Software |
| WKI | Spreadsheet format | Lotus 123 2x |
| WKQ | Spreadsheet | Quattro |
| WKS | Spreadsheet | Lotus 1-2-3 version 1A - Lotus Symphony 1.0, Microsoft Works |
| WKS | Workspace | Xlisp |
| WKZ | Spreadsheet format | Dos Navigator |
| WLK | Graphics | Virtus Walkthrough |
| WLK | Walk Through for any game | many |
| WMA | Windows Media Audio audio file | |
| WMC | Backup of startup files by Windows MathCad autoexec.wmc | MathCad |
| WMC | Macro file | WordPerfect for Win |
| WMC | Text file | WordMARC |
| WMDB | Windows Media Player database | Windows Media Player |
| WMF | Windows MetaFile vector graphics | |
| WMO | WoW Map Object | Blizzard Entertainment games (World of Warcraft/Warcraft series) |
| WMP | Graphics (Windows Magic Icon Palette) | |
| WMV | Windows Media Video video file | |
| WN | Text | NeXT WriteNow |
| WNF | Corel Draw Font File | CorelDraw |
| WOA | Swap file | Windows 3.x |
| WOC | Organization | Windows OrgChart |
| WOW | Music (8 channels) | Grave Mod Player |
| WP | Word Perfect Format | WP |
| WP5 | Document | WordPerfect 5.x |
| WPD | Document | WordPerfect 6.0 - PFS:WindowWorks |
| WPD | Windows printer driver (uninstallable) | Windows |
| WPF | Fax | WorldPort |
| WPF | Form | WordPerfect |
| WPG | WordPerfect Graphics vector graphics | DrawPerfect |
| WPJ | Watcom C/C++ IDE project | IDE.EXE |
| WPK | Macros | WordPerfect for Win |
| WPL | MediaRack Wave Playlist | MediaRack |
| WPL | Windows Media Playlist, for Windows Media Player | |
| WPM | Macros | WordPerfect |
| WPS | Text document | Microsoft Works |
| WQ! | Compressed spreadsheet | Quattro Pro |
| WQ1 | Spreadsheet | Quattro Pro |
| WR1 | Spreatsheet | Lotus Symphony 1.1 - 1.2 - 2 |
| WRD | Template | Charisma |
| WRI | Write editor format | Write - WinWord |
| WRK | Spreadsheet | Lotus Symphony 1.0 |
| WRL | VRML file | |
| WRP | Archive | Amiga WARP |
| WRS | Windows Resource e.g. might indicate error if word cannot open | WordPerfect for Win |
| WS | APL Worksheet | |
| WS | Text file | WordStar 5.0-6.0 |
| WS2 | Text file | WordStar 2000 |
| WSD | Document | WordStar |
| WSP | Workspace | Fortran PowerStation |
| WSQ | Wavelet-packet Scalar Quantization Format | |
| WSRC | X-wais source | |
| WST | Text file | WordStar |
| WTR | Working Timetable rules file | Simsig |
| WTT | Working Timetable timings file | Simsig |
| WTF | World of Warcraft Data File | World of Warcraft |
| WTF | WinTaper Data | |
| WWB | Button bar for document window | WordPerfect for Win |
| WWF | WWF Document Format | |
| WWK | Keyboard layout | WordPerfect for Win |
| WXH | Program/Script File | WaxHtml Web Programming Language |
| WXP | Document | EXP for Windows |
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