Open and convert STL files (.stl) in your browser. Nothing to install, no account.
5 conversions a day free, including 2 to solid formats like STEP.
On our servers. No account: deleted within 24 hours. Signed in: kept until you delete them. Never shared or used for training.
Every conversion listed here completes.
| Convert to | What you get | |
|---|---|---|
| STL to 3DM | Mesh | .3dm |
| STL to 3MF | Mesh | .3mf |
| STL to BREP | Surfaces recovered | .brep |
| STL to Collada | Mesh | .dae |
| STL to GLB | Mesh | .glb |
| STL to glTF | Mesh | .gltf |
| STL to IGES | Surfaces recovered | .iges |
| STL to OBJ | Mesh | .obj |
| STL to OFF | Mesh | .off |
| STL to Parasolid | Surfaces recovered | .x_t |
| STL to PLY | Mesh | .ply |
| STL to SLDPRT | Surfaces recovered | .sldprt |
| STL to STEP | Surfaces recovered | .step |
STL is the lingua franca of 3D printing: a flat list of triangles. No unit, colour, material or history — a cylinder is a fan of flat strips. The missing unit is the classic cause of scale accidents. Every slicer and mesh tool reads it.
You are printing, meshing or sending to a bureau — where triangles are what is wanted.