What is preserved
Surface triangles and generated or supplied normals are represented in the OBJ geometry.
Free · No signup · Browser-local
STL to OBJ Converter
Create a readable OBJ geometry file from an ASCII or binary STL surface mesh.
Convert locally
Select your STL file
Choose a local 3D file to start the preview.
What can be lost or unsupported
- STL has no standard materials or textures to recover
- No MTL file is generated
- STL units remain ambiguous
How to use this tool
- Choose a local .stl file under 100 MB.
- Wait for the preview and statistics.
- Convert and download the result: .obj
Common uses
- Open STL geometry in an OBJ-oriented editor
- Inspect geometry as text
- Create a basic mesh interchange file
Frequently asked questions
Are my files uploaded?
No. Model parsing, preview, and export run in your browser.
Is the conversion lossless?
No format conversion is described as lossless. Review the format-specific warnings above before using the output.
What is the file-size limit?
100 MB is a safety ceiling, not a guarantee. Mobile devices may need substantially smaller files.