| .wid |
SAP BusinessObjects Web Intelligence File |
| .w32 |
Win32 Makefile |
| .wdw |
WinDev Window File |
| .wpw |
WP Works Word Processor File |
| .wiq |
Visual Studio Work Item Query File |
| .wixlib |
WiX Library File |
| .wxl |
WiX Localization File |
| .wxi |
WiX Include File |
| .wxs |
WiX Source File |
| .wixobj |
WiX Object File |
| .wixout |
WiX XML Output File |
| .wixpdb |
WiX Debug File |
| .wixmsp |
WiX XML Patch File |
| .wixmst |
WiX Transform File |
| .wasm |
WebAssembly Binary File |
| .worksheet |
BBEdit Shell Worksheet File |
| .wowproj |
AddOn Studio Project File |
| .winmd |
Windows Metadata File |
| .webtest |
Visual Studio Web Test File |
| .wapproj |
Windows Application Packaging Project File |
| .xcodeproj |
Xcode Project |
| .xsd |
XML Schema Definition |
| .xap |
XACT Project |
| .xq |
XQuery File |