| wbo | DataFlex Web Business Object |
| wbt | WinBatch Script |
| wbt64 | WinBatch Script |
| wcp_settings | Alpha Five Web Project Settings |
| wct | Visual Basic WebClass HTML Template |
| wde | WinDev Report File |
| wdg | WinDev Procedures |
| wdi | WinDev Component Description |
| wdk | WinDev Component |
| wdm | WinDev WDINT Extraction File |
| wdo | WinDev Component List |
| wdt | WinDev Template File |
| wdw | WinDev Window File |
| wdy | WinDev Run-Time Template |
| webinfo | Visual Studio .NET Web Information Data |
| webtemplate | iWeb Template |
| webtheme | iWeb Theme Template |
| wet | WinSQL Export Template |
| wew | Debugging Tools for Windows Saved Workspace |
| wfo | Delphi Runimage File |
| wfs | Windows Script File |
| whl | Python Wheel Package |
| whs | WinHex Script |
| widget | HybridJava Widget |
| wiki | Wikitext Source Code |
| win | Visual FoxPro Window File |
| winmd | Microsoft Windows Metadata |
| winsqlscript | WinSQL Script |
| wiq | Visual Studio Work Item Query |
| wis | Rocket wIntegrate Script |
