3D Model Converter
Convert 3D models between STL and OBJ formats. Fully browser-side — great for 3D printing prep, mesh inspection, and CAD hand-offs.
How 3D Model Converter works
Binary or ASCII STL. OBJ triangles and quads are supported (quads are triangulated on the fly).
Choose STL for 3D printing pipelines, or OBJ for downstream mesh editing.
Get a clean, watertight text-format file. Shared vertex corners are automatically deduplicated on OBJ export.
Frequently asked
Does this convert to FBX, GLTF, STEP, or DWG?+
Not yet. Those formats need either heavy CAD kernels (STEP), proprietary Autodesk libraries (FBX, DWG), or a server-side pipeline. STL and OBJ cover most 3D-printing and mesh use-cases entirely client-side.
Is normals and material data preserved?+
STL is a geometry-only format, so this conversion focuses on the mesh itself. Face normals are recomputed on STL export; materials/textures in OBJ are ignored.
How big can the file be?+
Limited by your browser's memory. Meshes up to a few million triangles convert on modern laptops in seconds.