DWFX file is a 2D or 3D drawing created with Autodesk CAD software. It is saved in the DWFx format, which is similar to a . DWF file, but is formatted using Mic...DWFX file is a 2D or 3D drawing created with Autodesk CAD software. It is saved in the DWFx format, which is similar to a . DWF file, but is formatted using Mic