Files with the .DWFX extension contain CAD project data – namely two or three-dimensional drawings, object properties, and metadata.

The format is similar to that of DWF files but saved using Microsoft's XML Paper Specification – XPS for short - formatting. DWFX drawings are created in Autodesk CAD and can also be viewed in Autodesk Design Review or AutoCAD 2009. Since they are Microsoft compatible, Microsoft XPS Viewer from Windows Vista allows you to preview them as well.