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Open toolOBJ to STL Converter
Read OBJ vertices and triangular or convex planar faces, calculate normals and write binary STL. No materials, texture maps, lines or points.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Convert mesh to STL.
Your result
Enter your details
Result will appear here
How OBJ to STL Converter works
Read OBJ vertices and triangular or convex planar faces, calculate normals and write binary STL.
The tool processes the supplied input with browser APIs and bundled local libraries.
How to convert mesh to STL
Supply supported input and review the result.
Input and settings
Review the conversion settings
Check the supported input and conversion limits below.
Tool result
Review and save the result
Save a binary STL triangle mesh. Check the download in its target application before replacing your source.
Review the details
When to use OBJ to STL Converter
Export a simple surface mesh
Use OBJ vertices and supported faces to prepare an STL surface. The conversion does not add thickness or repair holes.
Triangulate convex faces
A convex planar polygon is split into triangles. Concave or nonplanar faces need triangulation in a modeling application first.
Check scale before printing
STL has no explicit unit declaration. Confirm the import units and dimensions in your slicer before using the mesh.
What the output contains
Review the format and conversion policy.
A binary STL triangle mesh. No materials, texture maps, lines or points. Concave/nonplanar polygons are rejected. Units remain the input units; manifoldness is not repaired. Up to 100,000 triangles.
Keep the original while checking the saved output. The result reflects the input and settings you supplied.
Supported input and limits
Check these conditions before converting.
No materials, texture maps, lines or points. Concave/nonplanar polygons are rejected. Units remain the input units; manifoldness is not repaired. Up to 100,000 triangles.
The page does not keep inputs or results after leaving. Keep the source and save the output you need.
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Open toolConvert mesh to STL with your input
Review the supported output and save your result.
OBJ to STL Converter: common questions
Answers about using OBJ to STL Converter and understanding its results.
What output can I save?
Save a binary STL triangle mesh. No materials, texture maps, lines or points. Concave/nonplanar polygons are rejected. Units remain the input units; manifoldness is not repaired. Up to 100,000 triangles.
Does the page upload my input?
No. Processing uses browser APIs and bundled local libraries. The selected file or entered source is not sent to a conversion server. Save the result before leaving.