STEP to STL Converter

STEP is the standard exchange format for CAD models from SolidWorks, Fusion 360, Onshape and FreeCAD. Slicers need a triangle mesh instead. This converter tessellates the CAD solid with OpenCASCADE and saves it as STL in millimetres, ready for Cura, PrusaSlicer or Bambu Studio.

Why convert STEP to STL?

• 3D print parts designed in CAD or downloaded from supplier catalogues
• Open CAD models in mesh tools like Blender or Meshmixer
• Share a part with someone who has no CAD software

What to know

• Curved surfaces are approximated with triangles, so very fine curves may look faceted.
• Both .step and .stp files are accepted. Assemblies are merged into one mesh.

How to convert STEP to STL

1. Select your .step file above.
2. Click "Convert to STL".
3. The .stl file downloads automatically with the same name as your original.