Free Online Converter
Convert STL to OBJ
Drop a .stl file and download a Wavefront .obj in seconds. Re-encodes your mesh for Blender, Maya, ZBrush and any tool that prefers OBJ. Runs entirely in your browser — no upload, no signup, no watermark.
How to convert STL to OBJ
- Drag your
.stlfile into the box above (or click to browse). - Preview the model in the viewer — drag to rotate, scroll to zoom.
- Click Convert & Download .obj. The
.objfile lands in your downloads folder.
Conversion runs in your browser via three.js. Your file never leaves your device — there's no upload, no server, and nothing is stored.
Converting an STL file to OBJ
STL is a geometry-only triangle mesh. OBJ (Wavefront) is a text-based mesh that can also hold groups, materials, and texture coordinates. This STL to OBJ converter re-encodes the same triangles as a standard .obj that any 3D or CAD tool reads.
Because the source STL has no color or materials, the OBJ comes out as plain geometry — there's nothing to invent. The mesh is preserved triangle-for-triangle; if you want materials or UVs, add them in your 3D app after importing.
The usual reason to go STL → OBJ is to bring a printable model into a DCC tool like Blender, Maya, or ZBrush, which all favor OBJ. If you instead need materials and textures to travel with the file for the web or a game engine, convert to GLB rather than OBJ.
Frequently asked questions
How do I convert an STL file to OBJ?+
Drop your .stl file into the box above, preview it in the 3D viewer, then click Convert & Download .obj. The conversion runs entirely in your browser — nothing is uploaded.
Is this STL to OBJ converter free?+
Yes. It's free with no signup, no watermark, and no file-size paywall. Flip3D processes everything locally in your browser.
Will the OBJ have colors or materials?+
No — and that's not a limitation of the converter. STL stores only geometry, so there are no colors or materials to carry over. You get a clean Wavefront OBJ with the same mesh; add materials in your 3D app afterward if you need them.
Does the OBJ open in Blender, Maya or ZBrush?+
Yes. OBJ is supported by virtually every 3D and DCC app — Blender, Maya, 3ds Max, ZBrush, Cinema 4D — which is the main reason to convert from STL.
Is my STL file uploaded anywhere?+
No. There is no upload and no server. The file is read and converted entirely on your device, and nothing is stored.
Can I convert OBJ back to STL?+
Yes — use the OBJ to STL converter for the reverse direction. For how the formats differ, see the STL vs OBJ vs 3MF reference.