List of All the File Extensions Formats and Types Starting With the Letter W
| File Extension | Description |
| .WA! | GigaStudio/GigaSampler compressed wave |
| .WAB | Microsoft Windows Address Book |
| .WAF | Microsoft Internet Explorer for Mac cache |
| .WAFF | IE saved web page format |
| .WAND | Apple GarageBand project |
| .WAS | ProComm source script |
| .WAV | WAVe PCM Sound, standard Windows sound format |
| .WAVE | WAVe PCM sound |
| .WEBP | WebP’s lossy compression algorithm |
| .WEBM | Matroska WebM video |
| .WEBPNP | Web Point And Print |
| .WEBTEST | Microsoft Visual Studio web test |
| .WEBZ | Web Format compressed eBook |
| .WEM | Wwise Encoded Media audio |
| .WET | WinSQL export template |
| .WPD | Corel WordPerfect document The SAW sound processing |
| .WPS | Microsoft Works document Kingsoft Office document Painkiller Overdose game Rockbox theme SDL Translator’s Workbench project |