Compare
STL vs FBX
STL is a triangle-mesh format commonly used to pass a finished shape to 3D printing. FBX can exchange richer production scene data such as materials, rigs, and animation, depending on the tools. Choose by the required downstream use.
Which format should you choose?
Use STL for a finished print mesh; use FBX when a 3D production workflow needs scene elements or animation, and test compatibility in the target tool.
Good fit for STL
3D printing
- Passing a printable surface model from CAD to a slicer
Good fit for FBX
3D production handoff
- Passing rigged characters and animation between compatible creation tools
Basic information
| Field | STL | FBX |
|---|---|---|
| Extension | .stl | .fbx |
| MIME type | model/stl | application/octet-stream |
| Common uses | 3D printing | 3D production handoff |
| How to open | Open in a 3D viewer or slicer and verify dimensions and mesh integrity. | Open in an FBX-capable editor or viewer and inspect meshes, materials, textures, scale, rigs, and animation. |
| Export or convert | When converting from OBJ or FBX, verify retained detail, units, scale, and triangle orientation. | When converting to glTF, verify materials, texture links, animation, units, and axis orientation. |
Choose by use case
Passing a printable surface model from CAD to a slicer
3D printing
STLPassing rigged characters and animation between compatible creation tools
3D production handoff
FBXKey point 1
STL focuses on surface geometry and typically omits materials and animation.
More on the differencesKey point 2
FBX may carry scene, material, rig, and animation data.
More on the differencesMore on the differences
For STL, verify scale, units, and that the mesh is suitable for slicing. For FBX, inspect materials, hierarchy, animation, axes, and textures after import.
- STL is commonly used for 3D printing handoff.
- FBX supports richer scene exchange between compatible 3D tools.
- Neither guarantees identical results across every application.
Frequently asked questions
Can FBX be used for 3D printing?
It may carry geometry, but printing workflows commonly require a validated mesh such as STL or another supported format. Check the slicer requirements.