Convert STL to OBJ
Convert STL to OBJ free in your browser. No upload, no signup, no watermark. Files stay on your device.
drop a .stl file
or click to browse
related
more stl & obj
see all 3D model converters →guide
how to convert stl to obj
Add your STL file
Drag and drop your STL file into the drop zone above, or click the box to browse for a file.
Click Convert
The conversion happens locally in your browser. No upload, no server, no waiting in queue.
Download the OBJ file
When the conversion finishes, the OBJ file is ready to download. Save it anywhere on your device.
FAQ
common questions
Is the STL to OBJ converter free?
Yes. Every conversion on this site is free, with no signup, watermark or file count limit.
Are my files uploaded to a server?
No. Conversion runs entirely in your browser using three.js. Your files never leave your device, so we cannot see them even if we wanted to.
Is there a file size limit for STL to OBJ?
There's no hard limit. In practice, file size is bounded by your device's available memory — typically several hundred megabytes work fine on a modern computer.
Does it work offline?
Once this page has loaded, yes. You can disconnect from the internet and the converter will still work. Reloading the page does require connectivity.
Will my STL file lose quality when converted to OBJ?
It depends on the formats involved. Converting between lossy formats (JPG, MP3) re-encodes data and slightly reduces quality. Lossless formats (PNG, WAV, FLAC) preserve everything. Pixel dimensions and color depth are preserved for image conversions.