Convert STL to OBJ Online
STL and OBJ serve different purposes. Convert STL to OBJ here when you need 3D printing, game assets, model exchange.
How to convert STL to OBJ
- Upload your STL file. Drag it onto the box above or click to browse. Files up to 200 MB are accepted.
- Choose OBJ as the output. The target format is pre-selected on this page — just press “Convert now”.
- Download the result. Conversion runs on our own server and the download starts as soon as it is ready. Your files are deleted automatically.
Why convert STL to OBJ?
STL is the standard format for 3D printing, storing surface geometry only. OBJ is a simple, widely supported 3D mesh format with a companion MTL material file. That difference is exactly why converting between them is so common: OBJ is the better choice for 3D printing, game assets, model exchange.
STL vs OBJ: key differences
| STL | OBJ | |
|---|---|---|
| File type | mesh | mesh |
| Typical use | 3D printing, CAD previews | 3D printing, game assets, model exchange |
| Compatibility | Universal in slicers; no colour or materials. | Universal mesh support; no animation. |
Tips for a clean STL to OBJ conversion
- Universal in slicers; no colour or materials.
- Use the highest-quality source STL you have — converting a compressed file again cannot restore lost detail.
- If you only need a smaller file, try a lower resolution or bitrate instead of a different format.
- Keep the original STL until you have checked the converted OBJ opens the way you expect.
Frequently asked questions
How do I convert STL to OBJ?
Upload your STL file to the converter on this page, make sure OBJ is selected as the output format and click “Convert now”. When the conversion finishes the download starts automatically.
Is this STL to OBJ converter free?
Yes — it is completely free and needs no account. Files up to 200 MB are accepted, and heavy use is rate-limited so the service stays available for everyone.
Will converting STL to OBJ reduce quality?
OBJ uses its own compression, so the converted file is re-encoded. Quality loss is minimal at sensible settings, but keep the original STL if you may need to convert again later.
What is a STL file?
STL is the standard format for 3D printing, storing surface geometry only. Its technical name is Stereolithography and it is typically used for 3D printing, CAD previews.
What is a OBJ file?
OBJ is a simple, widely supported 3D mesh format with a companion MTL material file. Its technical name is Wavefront OBJ and it is typically used for 3D printing, game assets, model exchange.
Can I convert STL to OBJ on my phone?
Yes. The converter runs in the browser on Android, iOS, Windows, macOS and Linux — no app installation is required.
Are my files kept on the server?
No. Uploaded files and converted results are deleted automatically a short time after the conversion finishes.