Turn a STEP CAD model into a 3MF 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
No file yet
Drop a STEP file or
Files stay on your computer.
Done
How to convert STEP to 3MF
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 3MF
3MF is already selected. You can switch to any other output from the menu.
Convert and download
Click Convert and your 3MF 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)
3MF is the modern 3D printing format from the 3MF Consortium. Unlike STL it records units, colours and multiple objects in one compressed file, and it is the native project format of Bambu Studio and PrusaSlicer.
Full name
3D Manufacturing Format
Type
Triangle mesh
Used in
Bambu Studio, PrusaSlicer, Cura, Windows 3D Viewer, OrcaSlicer
STEP stores exact surfaces; 3MF 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.