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| Name | Universal 3D File | AutoCAD Drawing | 
| File extension | .u3d | .dwg | 
| Original software | AutoCAD | |
| Binary | ■ | |
| ASCII | ||
| Polygonal | ■ | ■ | 
| NURBS | ■ | |
| Solids | ■ | |
| Smoothing groups | ■ | ■ | 
| Textures, materials | ■ | ■ | 
| Developer/Owner | 3D Industry Forum, Ecma International | Autodesk | 
| Description | ||
| Specification | Universal 3D File Format | |
| Format features | Attempt to create a universal format for the exchange of 3D-data, including for publishing on the Internet. One of the successors of obsolete format WRL (VRML) | Despite the « two-dimensional » AutoCAD specialization, it is possible to create solid models. Autodesk itself for three-dimensional modeling software promotes Inventor | 
| Viewing software | GLC_Player (free), MeshLab (free) | DWG TrueView (free), DWGSee (free) |