How to convert FBX to STL
- Drop your .fbx file into the box above, or click Choose file.
- Check the 3D preview, size and triangle count.
- Make sure STL is selected as the output format. Adjust scale or up-axis if needed.
- Click Download. The .stl file is created instantly on your device.
Why convert FBX to STL?
FBX files from game assets, Mixamo or 3D marketplaces often need to be printed. The converter applies every node transform and the bind pose, merges all meshes and writes a printable STL. Skeletons, animation and textures are dropped.
What changes in the conversion
- Textures are dropped. STL cannot store image textures.
- Up-axis. FBX is Y-up while STL is usually Z-up; the model is rotated so it stands the right way up. Untick "Convert up-axis" to keep the raw coordinates.
- Animation and rigs are not exported. The model is written in its rest (bind) pose.
- Geometry is preserved. Every triangle, with all object transforms applied, ends up in the new file.
FBX vs STL
| FBX | STL | |
|---|---|---|
| Full name | Filmbox | Stereolithography |
| Stores | geometry, materials, skeletons and animations | geometry only |
| Colour | Yes | No |
| Textures | Yes | No |
| Units | set per file (often centimetres) | none – most programs read STL numbers as millimetres |
| Exact CAD geometry | No | No |
About the formats
FBX (Filmbox) was originally developed by Kaydara and now owned by Autodesk. It is a proprietary scene format that stores meshes, materials, skeletons and animation. It is the usual exchange format for animated characters between Maya, 3ds Max, Blender, Unity and Unreal Engine.
STL (Stereolithography) was created by 3D Systems in 1987 for its stereolithography printers. It describes only the surface of a model as a list of triangles, without colour, materials or units. It is the default file for 3D printing and the format almost every slicer (Cura, PrusaSlicer, Bambu Studio, Chitubox) opens.
Frequently asked questions
Is this converter free?
Yes. You can convert FBX to STL for free – up to 3 conversions a day, with no sign-up and no watermark. If you need more, Pro gives you unlimited conversions and batch conversion (free for 7 days).
Are my files uploaded to a server?
No. The conversion runs entirely in your browser using WebAssembly and JavaScript. Your model never leaves your computer, which also makes it safe for confidential parts and patient data.
Is there a file size limit?
There is no fixed limit. Files of a few hundred megabytes work on a typical laptop; the practical limit is your device's memory.