OBJ to STL Converter

Convert a Wavefront .obj into an .stl for 3D printing. Quads and polygons are triangulated and every object can go into one file or separate files.

How to convert OBJ to STL

Drop the .obj above.
Untick objects you don't want; tick One file per object for separate STLs.
Keep STL selected and click Download STL.

Details

Polygons with more than three corners are split into triangles.
OBJ has no units: the numbers are taken as millimetres.
Materials, textures and UVs are not part of STL and are dropped; keep colours with OBJ to 3MF.

Frequently asked questions

Is OBJ better than STL for printing?

Both store triangles; slicers read both. STL is the most widely accepted. 3MF is the more modern choice and keeps colours and units.

Is my file uploaded?

No. Conversion happens in your browser.