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STL to GLB converter
Export STL triangle geometry as GLB for your next mesh workflow.
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FROM FILE TO FINISHED MESH
How to convert your file
Review your settings
Choose the right mode, scale and detail. Processing runs in your browser.
Inspect and download
Rotate the preview, save the output and verify it in your next application.
How STL to GLB works
STL → GLB: 1000 mm → 1 m (÷1000). Processing stays in your browser. Unitless mesh inputs retain their numeric coordinates. GLB/glTF input uses meters and is converted to millimeters (×1000). GLB/glTF output interprets the working coordinates as millimeters and writes meters (÷1000). Check a known dimension in the destination application.
Compatibility and limitations
This changes the container for geometry. It does not recover colors, textures, animation, CAD surfaces or a feature history. Check destination units before using the model.
Get a more reliable result
Start with a clean source, choose dimensions appropriate to the intended use, and inspect the exported file. A successful conversion does not guarantee printability or automatic mesh repair. Read our detailed workflow guide for the decisions that matter.
Processing limits
STEP input: 20 MB. STL, OBJ and 3MF input: 50 MB. Output is limited to 1.2 million triangles. Complex models may need simplification in the source application.
One file at a time. Processing stops after 90 seconds. Files remain in browser memory, and no conversion upload is performed. Replacing a file clears the previous result. Closing the tab releases its working data.
Questions about STL to GLB
What information changes during conversion?
This changes the container for geometry. It does not recover colors, textures, animation, CAD surfaces or a feature history. Check destination units before using the model.
How do I inspect the output?
Reopen the exported GLB in an application that explicitly supports GLB. Compare a known dimension, the complete surface and the number of intended parts with the source STL. The STL viewer can inspect the source STL, not this GLB export. GLB: 1000 mm → 1 m (÷1000). STL · 3D GLB / glTF · m ↔ mm
Where can I learn more?
Read the related guide or explore original free STL examples.
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STL to ZIP converterCalibration examples: source files and measured results
Synthetic calibration inputs converted with the current geometry engine on 18 October 2026. These checks measure the digital mesh; no physical printing was performed. Download the sources and repeat the conversion with the listed settings. STL contains no unit metadata; coordinates in these examples are interpreted as millimetres.
Only the file formats shown below were tested in these examples. They do not validate external application steps, recover native CAD history or generate printer G-code.
STL → GLB · 20 mm → 0.02 m
Settings: mm → m (÷ 1000).
| Triangles | Dimensions (mm) |
|---|---|
| 4 | 20 × 20 × 20 |
Settings and checksums · JSON · Source file + Converted file · ZIP