Converters · STL → OBJ
STL to OBJ Converter
Free, private, in your browser. Convert STL to OBJ — no signup, no upload.
Unlike online converters that upload to a server, your file never leaves your browser.
⇄ Need OBJ to STL instead?Drop your 3D file here
or click to browse — .stl files up to 200 MB
When to convert STL to OBJ
You have an STL from a 3D printing library (Thingiverse, Printables) and need to bring it into a modeling tool that expects OBJ, or a pipeline that wants named vertex and face data instead of a bare triangle soup.
STL vs OBJ: what’s the difference?
STL and OBJ are the two most widely accepted mesh formats, and both are geometry-first. STL is the 1987 standard — a bare list of triangles with no color, units or UV. OBJ is the plain-text format Blender, Maya and most DCC tools prefer, storing the same geometry as reusable named vertices and faces. Converting STL to OBJ rewraps your triangles in a structure 3D-modelling software reads more naturally, without changing the shape at all.
What STL → OBJ keeps and drops
Preserved
- ✓Every triangle, exactly as in the STL
- ✓Real-world scale and dimensions
- ✓Model orientation
Dropped
- ✗No color or materials — STL never stored any, so the OBJ has none either
- ✗No UV coordinates — STL carries no texture data and MeshRefinery invents none
How to convert STL to OBJ
- 1Drop your .stl file onto the box above, or click to browse.
- 2The file is parsed in your browser — nothing is uploaded.
- 3Check the 3D preview, then click “Convert to OBJ”.
- 4A .obj file downloads, ready to import into Blender or Maya.
Because STL only ever stored geometry, this conversion loses nothing — but it also cannot add what was never there. Do not expect color, materials or UVs in the OBJ; there is no source data to build them from. If you need those, start from a GLB or 3MF instead.
STL to OBJ — FAQ
Will this add UVs or materials that weren’t in the STL?
No — STL never stored them, so there’s nothing to recover. The OBJ output is geometry-only, same as the source.
Binary or ASCII STL — does it matter?
Both are accepted; the converter detects the format automatically.