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| Name | Creo Part File | Object File Format | 
| File extension | .prt | .off | 
| Original software | Creo (Pro/ENGINEER) | |
| Binary | ■ | ■ | 
| ASCII | ||
| Polygonal | ■ | ■ | 
| NURBS | ■ | |
| Solids | ■ | |
| Smoothing groups | ■ | ■ | 
| Textures, materials | ■ | ■ | 
| Developer/Owner | PTC | |
| Description | ||
| Specification | ||
| Format features | Open storage format polygonal models | |
| Viewing software | Creo Elements/View Express (free), Delcam Exchange 2012 (free) | GLC_Player (free), MeshLab (free) |