Choose a OBJ file
Drop your OBJ model into the converter or select it from your device.
3D ConverterOBJ to STL
Runs locally in your browser
OBJ to STL Converter
Convert OBJ to STL directly in your browser, then inspect and download the result. Static triangle geometry only. STL does not retain materials, colors, animation or reliable unit metadata.
Static triangle geometry only. STL does not retain materials, colors, animation or reliable unit metadata.
Drop your OBJ file here
or choose a file from your device
Up to 100 MB total. Select accompanying textures, .bin and .mtl files together with the model. External URLs are not fetched.
Output format
STL
Local conversion — the file stays on this device
How to convert OBJ to STL
Validate and convert
The converter checks the source format before processing the model geometry.
Download the STL
Save the generated STL file and open it in your preferred 3D application.
Browser conversion
How OBJ becomes STL
Source fileOBJ
Browser conversion3D
Output fileSTL
Static triangle geometry only. STL does not retain materials, colors, animation or reliable unit metadata.
Data map
What survives OBJ to STL
This map describes the exported result, not the original source file. Review every amber item in the receiving application before relying on it.
GeometryPreserved
MaterialsNot retained
TexturesNot retained
Animation & riggingNot retained
Units & orientationReview
CAD featuresNot retained
About OBJ to STL conversion
Static triangle geometry only. STL does not retain materials, colors, animation or reliable unit metadata.
Conversion quality
Printing formats are geometry-first. Confirm units, normals, non-manifold edges and wall thickness in your slicer before fabrication.
Related converters
3D ConverterBefore you convert
What is preserved when converting OBJ to STL?
Static triangle geometry only. STL does not retain materials, colors, animation or reliable unit metadata.
When is STL the right output format?
Choose this output when preparing a static model for a slicer or 3D-print workflow; confirm units and watertightness before printing.
What should I check after converting OBJ to STL?
Printing formats are geometry-first. Confirm units, normals, non-manifold edges and wall thickness in your slicer before fabrication. Open the downloaded file in the application you plan to use. Check scale, orientation, mesh completeness and the format-specific limits described above before printing, manufacturing or production use.
Where is my model processed?
Available converters process files in your browser. Saving to the workspace stores a GLB copy in this browser's local database; clearing site data removes it.