STL to GLB converter
Drop an STL file and get a GLB back in seconds. STL is triangles only, used mostly for 3D printing slicers. GLB is one self-contained file, the usual choice for the web, Godot, three.js, Android AR and general sharing. 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 stl to glb converter
- 1Choose your STL 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 GLBExport a GLB with one click. Downloads are included with every plan.
What carries over
- STL has no colour or materials, so the GLB gets a neutral grey material you can restyle.
- STL is Z-up, so the model is turned Y-up on import and keeps its orientation in the GLB.
- Units: STL is unitless (slicers assume millimetres) and GLB is metres by convention. Numbers are copied 1:1, so check the size in the target app.
STL vs GLB
| STL | GLB | |
|---|---|---|
| Full name | stereolithography mesh | binary glTF |
| Appearance | no colour or materials | PBR materials and embedded textures |
| Animation | No | Yes |
| Units | unitless (slicers assume millimetres) | metres by convention |
| Best for | 3D printing slicers | the web, Godot, three.js, Android AR and general sharing |
Questions
- Is my STL file uploaded?
- No. The STL is parsed and the GLB is written by JavaScript in your browser tab. The file never reaches our servers.
- Will the GLB look the same as the STL?
- The geometry is identical. GLB keeps materials and textures too. 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.