HIGH  |  | |
| Name | STereoLithography | STEP |
| File extension | .stl | .stp, .step |
| Original software | ||
| Binary | ■ | ■ |
| ASCII | ■ | ■ |
| Polygonal | ■ | |
| NURBS | ■ | |
| Solids | ||
| Smoothing groups | ■ | |
| Textures, materials | ||
| Developer/Owner | ISO | |
| Description | ||
| Specification | The StL Format | Download PDF |
| Format features | One of the most ubiquitous exchange formats polygonal geometry between CAD-systems. Can have both binary and ASCII-structure, which is why the same file can vary in size tenfold. See also PLY | The basic format of the transfer surfaces between CAD-systems. See also IGES |
| Viewing software | GLC_Player (free), MeshLab (free) | Delcam Exchange 2012 (free), eDrawings (free) |
