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| Name | STEP | GL Transmission Format |
| File extension | .stp, .step | .gltf, .glb |
| Original software | ||
| Binary | ■ | ■ |
| ASCII | ■ | ■ |
| Polygonal | ■ | |
| NURBS | ■ | |
| Solids | ||
| Smoothing groups | ■ | ■ |
| Textures, materials | ■ | |
| Developer/Owner | ISO | Khronos Group |
| Description | ||
| Specification | Download PDF | |
| Format features | The basic format of the transfer surfaces between CAD-systems. See also IGES | Supports 3D model geometry, appearance, scene graph hierarchy, and animation. A .gltf file may be self-contained or may reference external binary and texture resources, while a .glb file is entirely self-contained |
| Viewing software | Delcam Exchange 2012 (free), eDrawings (free) | Paint 3D, MS Office etc |