Drop an STL below, preview the mesh, and download it as OBJ. The conversion runs entirely in your browser with three.js — your file is never uploaded, so it's instant and private.
Converted locally · never uploaded · no signup
The STL is parsed and re-exported in your browser. No server queue, no email gate, no privacy risk.
See exactly what you're converting before you convert it — orbit the mesh right on the page.
Geometry is transferred triangle for triangle; the OBJ opens in Blender, Maya, ZBrush and any DCC tool.
Drag the .stl into the tool, or click to browse. It renders as a live preview.
The engine re-encodes the mesh as Wavefront OBJ in your browser.
The .obj downloads instantly — ready for Blender, Maya or your marketplace upload.
STL is a print-only format: pure triangles with no texture coordinates, groups or material slots. OBJ is what modeling and sculpting tools prefer for editing and what many marketplaces expect for uploads. Converting STL to OBJ lets you take a printable file back into Blender, ZBrush or Maya for retopology, UV work or material assignment.
STL stores only triangles and normals, so that is exactly what the OBJ will contain — geometry with computed normals, no UVs and no materials (STL never had them). The mesh itself is preserved one-to-one, with no decimation, resampling or watermarking.
Yes — free and unlimited. No signup, no conversion quota, no watermark on the output.
No. Loading, converting and exporting all happen in your browser's memory. The file never touches a server.
No — because STL cannot store them. The OBJ contains the full geometry with normals, ready for you to UV-map and texture in a DCC tool.
Only your device's memory. Since there is no upload, multi-hundred-MB meshes that would time out on server-based converters work fine here.
Yes — use the free OBJ to STL converter, linked below.
Type a prompt, get a textured 3D model in about a minute — then download it as GLB, STL, OBJ, FBX or USDZ.
Generate a model from text →