STL to 3MF Converter

3MF is a compressed, modern replacement for STL. It stores units explicitly, so models don't import at the wrong scale, and files are usually much smaller than binary STL.

Why convert STL to 3MF?

• Smaller files for sharing and uploading
• Explicit millimetre units, so no more models imported 25x too small
• Native format for Bambu Studio and PrusaSlicer projects

What to know

• The STL geometry is kept as-is; STL has no colors to carry over.

How to convert STL to 3MF

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