OBJ to STL Converter

Convert OBJ models (from Blender, scans, marketplaces) into printable STL meshes — textures dropped, geometry cleaned.

InstantCleans duplicate verticesFree ≤25 MBNo sign-up

OBJ vs STL in 30 seconds

OBJ can carry materials and textures; STL is pure triangles — which is all a slicer needs. Conversion drops appearance data, merges duplicate vertices, and fixes face winding so the mesh slices predictably.

Frequently asked questions

Will textures and colors survive?
No — STL has no color or texture support at all. Geometry converts perfectly; appearance data is discarded by design. If you need colors, convert to GLB instead.
Is this converter free?
Yes — up to 10 conversions a day and files up to 25 MB, no account needed. Larger files (up to 60 MB) and high-detail STEP output use credits ($9 for 20). Everything runs server-side on real geometry kernels, and failed jobs auto-refund.
What happens to my files?
Files are uploaded only to run your conversion and stored briefly so you can download the result. We don't share them, mine them or train on them. See our privacy policy.