Free STL to OBJ Converter
Convert STL to OBJ locally when geometry needs a more editable mesh exchange format.
Convert STL to OBJ locally for a more editable mesh format.
About this tool: Free STL to OBJ Converter
Convert STL to OBJ locally in the browser when geometry needs a more editable mesh exchange format. No upload required — everything runs locally in your browser for privacy and speed.
Common use cases
- STL input is geometry-only, so OBJ output will not gain materials that were never in the source.
- Use this when a modeling tool accepts OBJ more smoothly than STL.
STL to OBJ, and what it cannot bring back
STL to OBJ keeps the mesh and nothing else, because STL never stored anything else. Do it when a tool asks for OBJ specifically — not in the hope of recovering colour, which no conversion can do.
Doing it properly
- 1
Check whether you still have the original GLB
If you do, convert from that instead. It is the difference between a textured model and a grey one.
- 2
Convert locally
The mesh is parsed in your browser, so an unreviewed part is not uploaded to a third party.
- 3
Expect a material-free OBJ
The result opens grey by definition. If it needs colour, the colour has to be re-authored on top.
STL to OBJ questions
- Does STL to OBJ restore colour?
- No. STL has no colour or UV data, so there is nothing to restore. The result is grey geometry.
- What unit is the OBJ in?
- Whatever the STL numbers were. Neither format carries a unit, so confirm the bounding box yourself.
- Should I convert to GLB instead?
- If the destination is the web or an engine, yes — GLB is one portable file. OBJ is for older editors.
Quick tips
- STL input is geometry-only, so OBJ output will not gain materials that were never in the source.
- Use this when a modeling tool accepts OBJ more smoothly than STL.
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