Drop a Wavefront .obj file, inspect it live, then export a clean STL — ready for any slicer.
100% local · file never leaves your browser
OBJ is the lingua franca of 3D modeling: every DCC tool reads and writes it, often with a paired .mtl material file. STL is the lingua franca of 3D printing — geometry-only, no materials, no UVs.
This converter preserves every triangle and welds the OBJ groups into a single mesh. Materials, vertex colors and UV maps are dropped — STL has no slot for them.
The file is parsed in WebAssembly + WebGL on your device. Nothing leaves.
No queue, no upload. Most files convert in well under a second.
Orbit, pan and zoom the result in real time before you commit.
Yes. If your OBJ provides normals, they pass through. Otherwise, they're recomputed for smooth shading.
No. Materials don't survive the trip to STL anyway, so just drop the .obj.
All objects are merged into one STL. If you need them separate, split them before export.