Free 3D converter / STL to OBJ
Convert STL to OBJ, free and online
Turn a .stl file into a .obj file. It runs in your browser: no sign-up and nothing to install, and most files never leave your computer.
Drop your STL file here
or choose a file
Free · No sign-up · Converted in your browser · Files up to 1 GB
What you get: You get the geometry as an OBJ. Materials (.mtl) and textures aren't written, so it comes through plain.
How to convert STL to OBJ
- 1Drop your .stl file
On the converter above, or click to choose it. - 2Click Convert to OBJ
The .obj file downloads straight away.
STL vs OBJ
STL: STL describes a shape as triangles only: no units, no colours, no curves. It's what 3D printers, slicers and scanners use.
OBJ: OBJ is a simple, widely read mesh format: triangles or polygons, with materials in a separate .mtl file.
Other conversions
All conversions →Is the STL to OBJ converter free?
Yes, with no sign-up and no limit on the number of files. A free account is only needed if you want to send the model to someone for feedback.
Is my file uploaded?
Most files are read and converted right in your browser and never leave your computer. Very large CAD and mesh files are converted on our server instead, then deleted straight after the converted model is sent back to your browser.
What's the biggest STL I can convert?
Up to 1 GB. Big files take longer, and very large CAD files go through our server, as above.
Converting it to send to a client or supplier?
Send them a link instead. They open the model in any browser, with no account and no CAD program, and click the spot they want changed.