GlTF to STL converter
Drop a glTF file and get an STL back in seconds. glTF is human-readable JSON, used mostly for debugging and hand-editing scene data. STL is triangles only, the usual choice for 3D printing slicers. The conversion runs entirely in your browser, so your file never leaves your device.
Choose a file to see its details here. Nothing is uploaded: everything runs in your browser.
How to use the gltf to stl converter
- 1Choose your glTF fileDrag it onto the panel or click to browse. It's read locally and never uploaded.
- 2Check the previewOrbit the model and check the triangle count, size and materials before converting.
- 3Download the STLExport a STL with one click. Downloads are included with every plan.
What carries over
- glTF textures don't carry over: STL supports no colour or materials.
- Animation and rigs are dropped; STL stores static geometry only. The model is exported in its rest pose.
- The STL is written Z-up, which is what slicers and scan tools expect.
- Units: glTF is metres by convention and STL is unitless (slicers assume millimetres). Numbers are copied 1:1, so check the size in the target app.
glTF vs STL
| glTF | STL | |
|---|---|---|
| Full name | GL Transmission Format (JSON) | stereolithography mesh |
| Appearance | PBR materials; textures embedded as data URIs in our export | no colour or materials |
| Animation | Yes | No |
| Units | metres by convention | unitless (slicers assume millimetres) |
| Best for | debugging and hand-editing scene data | 3D printing slicers |
Questions
- Is my glTF file uploaded?
- No. The glTF is parsed and the STL is written by JavaScript in your browser tab. The file never reaches our servers.
- Will the STL look the same as the glTF?
- The geometry is identical. STL holds no colour or materials, so surface appearance changes. See the notes above for this exact pair.
- Is there a file size limit?
- Files up to 150 MB open, but very large models depend on your device's memory. Desktop browsers handle big files best.