Turn a STEP CAD model into a 3DM mesh. Curved surfaces are meshed finely enough to stay smooth, and the part keeps its real size and orientation.
Fine, accurate meshing of curved surfaces
Real size and right way up
Runs on your computer: nothing is uploaded
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Drop a STEP file or
Files stay on your computer.
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How to convert STEP to 3DM
Add your STEP file
Drop it on the converter above or click browse. It opens in your browser, so nothing is uploaded.
Check the format is 3DM
3DM is already selected. You can switch to any other output from the menu.
Convert and download
Click Convert and your 3DM file is ready in seconds. Download it straight away.
What is STEP?
STEP stores exact CAD geometry: true planes, cylinders, cones and freeform surfaces joined into solids. It is the standard way to move parts between CAD systems such as SolidWorks, Fusion 360, Inventor, CATIA and FreeCAD.
Full name
ISO 10303 (Standard for the Exchange of Product Data)
3DM is the native file of Rhino, used widely in industrial, jewellery and architectural design. It stores NURBS surfaces, SubD objects, meshes and block instances.
STEP stores exact surfaces; 3DM needs triangles. We mesh each surface with a deviation of 0.05% of the part's size, which keeps holes and fillets smooth for printing and rendering.
Dimensions stay in the units of the original file, usually millimetres.