3MF to STL, with clarity.
Preview your model. Check its dimensions. Download with confidence.
Model files stay in your browserHow local processing works
01
Choose a 3MF
Open a supported mesh file or try a sample. No account and no model upload.
02
Check the details
Confirm the dimensions in millimeters and choose which placed objects to include.
03
Download your STL
Get one STL or separate files in a ZIP. Import them as millimeters in your slicer.
What makes the move to STL?
| IN YOUR 3MF | IN YOUR STL |
|---|---|
| Triangle geometry | Preserved, with transforms applied |
| Object positions & scale | Preserved as millimeter coordinates |
| Colors, materials & textures | Not included |
| Slicer settings & project structure | Not included |
STL is a copy of the surface geometry. Keep your original 3MF if you need to edit the project later.
Understand the format differences →A few things to know
One file at a time. Up to 50 MiB compressed, 200 MiB expanded, and 1 million expanded triangles. Device memory can impose lower practical limits.
This tool checks readable geometry and dimensions. It does not repair meshes or certify a model as printable.
Supported files & limits →