| .widget |
Yahoo! Widget |
| .website |
Internet Explorer Pinned Site Shortcut |
| .wld |
Terraria World File |
| .wdp |
Windows Media Photo File |
| .w32 |
Win32 Makefile |
| .wixlib |
WiX Library File |
| .wxl |
WiX Localization File |
| .wxi |
WiX Include File |
| .wixobj |
WiX Object File |
| .wixout |
WiX XML Output File |
| .wixmsp |
WiX XML Patch File |
| .wixmst |
WiX Transform File |
| .wam |
Worms Armageddon Mission File |
| .wrts |
Wrts File |
| .webapp |
Firefox Web App Manifest File |
| .wrl |
VRML World |
| .weap |
Quake 3 Engine Weapon File |
| .wn |
WN Web File |
| .wldx |
World Map File |
| .wtx |
Text Document |
| .wil |
WinImage Disk Image List |
| .wul |
WinUHA Language File |
| .xml |
Extensible Markup Language file |
| .xfd |
XFD File |