OBJ to STL Converter
A binary STL triangle mesh. Read OBJ vertices and triangular or convex planar faces, calculate normals and write binary STL.
Open toolSTEP to STL Converter
Load a STEP model with the bundled Open CASCADE WebAssembly importer and export its triangle meshes. Up to 10 MB input and 100,000 output triangles.
Free to useNo sign-upRuns in your browser
Enter your details
Enter the inputs, then select Tessellate STEP model.
Your result
Enter your details
Result will appear here
How STEP to STL Converter works
Load a STEP model with the bundled Open CASCADE WebAssembly importer and export its triangle meshes.
The tool processes the supplied input with browser APIs and bundled local libraries.
How to tessellate STEP model
Supply supported input and review the result.
Choose the supported file
Choose STEP CAD model. Processing reads the file in this browser.
Input and settings
Tool result
Review and save the result
Save a binary STL surface mesh. Check the download in its target application before replacing your source.
Review the details
When to use STEP to STL Converter
Prepare a CAD surface for a mesh tool
STEP surfaces are tessellated by Open CASCADE. The STL result contains triangles rather than parametric CAD features.
Adjust mesh approximation
A smaller deflection generally creates a finer surface approximation. Increase it if the model exceeds the triangle limit.
Check manufacturing dimensions
The importer converts units to millimeters. Review scale, surface accuracy and mesh topology in your manufacturing workflow.
What the output contains
Review the format and conversion policy.
A binary STL surface mesh. Up to 10 MB input and 100,000 output triangles. Output is a tessellated surface in millimeters, not a CAD solid. Deflection controls approximation; dimensions and topology need review before manufacturing.
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.
Up to 10 MB input and 100,000 output triangles. Output is a tessellated surface in millimeters, not a CAD solid. Deflection controls approximation; dimensions and topology need review before manufacturing.
The page does not keep inputs or results after leaving. Keep the source and save the output you need.
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Open toolTessellate STEP model with your input
Review the supported output and save your result.
STEP to STL Converter: common questions
Answers about using STEP to STL Converter and understanding its results.
What output can I save?
Save a binary STL surface mesh. Up to 10 MB input and 100,000 output triangles. Output is a tessellated surface in millimeters, not a CAD solid. Deflection controls approximation; dimensions and topology need review before manufacturing.
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.