| Extension | 描述 | 檔案格式 |
|---|
| w | Database AppBuilder Source Code File | Developer Files |
| w02 | Multiple Archive File | 資料檔 |
| w3g | Warcraft 3 Replay Files | 遊戲檔案 |
| w3m | Warcraft 3 Map File | 遊戲檔案 |
| w3x | Warcraft 3 Map File | 遊戲檔案 |
| wad | Compressed Doom Game File | 遊戲檔案 |
| wal | Winamp Skin File | Misc Files |
| war | Konqueror Archived HTML File | 網頁檔案 |
| wav | Waveform Audio File Format | 聲音檔案 |
| wax | Windows Media Player Redirect File | 聲音檔案 |
| wba | WindowBlinds Skin File | Misc Files |
| wbfs | Wii Backup File System File | 遊戲檔案 |
| wbmp | Wireless Application Protocol Bitmap File | 圖檔 |
| wdb | Microsoft Works Database File | Misc Files |
| webarchive | Safari Web Archive | 網頁檔案 |
| webloc | Safari Webloc File | 網頁檔案 |
| webm | WeM Container File | 視頻檔案 |
| webp | WebP image File | 圖檔 |
| website | IE9 Pinned Website File | 網頁檔案 |
| wem | Margonem Maps | 遊戲檔案 |
| wer | Microsoft Windows Error Report File | 系統檔案 |
| wfc | Windows Wireless Network Settings File | 設定檔 |
| wft | Nicolet WFT Export File | 資料檔 |
| wfw | WFW File | 備份檔案 |
| wgt | Opera Widget File | Misc Files |
| widget | Yahoo Widget File | 執行檔 |
| wim | Image Format File | 磁碟映像檔 |
| win | Opera Saved Window File | 網頁檔案 |
| windowslivecontact | Windows Live Contact File | Misc Files |
| wlmp | Live Movie Maker Project File | 資料檔 |
| wma | Windows Media Audio | 聲音檔案 |
| wmdb | Windows Media Database File | 資料檔 |
| wmf | Windows Metafile File | 圖檔 |
| wml | Wireless Markup Language | 網頁檔案 |
| wmv | Windows Media Video | 視頻檔案 |
| woc | Microsoft Office 2007 Organization File | 資料檔 |
| woc | Widows Orgchart Organization Chart File | 資料檔 |
| wotreplay | World Of Tanks Playback File | 遊戲檔案 |
| wp3 | Microsoft Photo Story Project File | 多媒體檔案 |
| wpd | Word Perfect Document | 文字檔 |
| wpl | Windows Media Player Playlist File | 視頻檔案 |
| wpostx | wpostx | 網頁檔案 |
| wps | Microsoft Works Document File | 文件檔案 |
| wri | Windows Write Document | 文字檔 |
| wrl | Virtual Reality Modeling Language World File | 3D Files |
| wses | WinSesame Encrypted File | 加密檔案 |
| wsz | Winamp Compressed Skin File | 壓縮檔案 |
| wtc | Watertec Database | 資料檔 |
| wtd | WinTune Document File | Misc Files |
| wtf | World of Warcraft Text File | 遊戲檔案 |
| wv | WavPack compressed Audio File | 聲音檔案 |