| wat | Web Archive Transformation File |
| waz | Web Archive ZIP |
| wbpz | ANSYS Workbench Project Archive |
| wbu | Samsung PC Studio Backup Data |
| wdz | WinDev Zip Archive |
| webarchivexml | Android Web Browser Archive |
| webpnp | Web Point-and-Print Cabinet |
| wfz | Amazfit Watch Face |
| wgz | S60 Web Runtime Widget Package |
| whb | CopyTrans iPod Backup Image |
| winuha | UHarc Archive |
| wlz | WinAMP Language Pack |
| wmb2 | Static Windows Mail Backup Archive |
| wna | Whitenoise Archive |
| wpb | Windows Phone Device Manager Backup |
| wpk | GuinXell Package |
| wpress | All-in-One WP Migration Archive |
| wr3 | WRaptor Compressed Archive |
| wra | WRaptor Compressed Archive |
| wrc | FreeArc Archive File |
| wsp | Microsoft SharePoint Solution Package |
| wx | Wanam Xposed Backup File |
| wxapkg | WeChat Applet Package |
| wxz | wxWidgets Zipped Package |
| wza | Encryption Wizard Archive |
| wzd | Encryption Wizard Encrypted Individual File |
| wzp | AMP1-16 Update Archive |
| x | Alysis SuperDisk Self-extracting Archive |
| x1z | X1 Search Saved Search Archive |
| xam | Xamarin Package |
| xapk | Compressed Android Package |
| xar | Extensible Archive Format Data |
| xbw | XBW Compressed Data |
| xcp | Xbox Compressed Package |
| xdc | DarkCryptTC XDC Encrypted Container |
