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3MF → STL · local conversion
Convert 3MF to STL in your browser
Choose a 3MF model and download a binary STL without sending the design to a conversion server.
3MF → STL
Convert on this device
3MF materials, colors and print metadata are not part of STL. Multiple 3MF bodies become one triangle mesh in the exported STL; verify scale and separate parts in your slicer if needed.
What changes from 3MF to STL?
3MF can store multiple objects, units, colors, materials and print metadata inside one package. STL stores only a triangle surface. This converter keeps the printable geometry and writes it as a compact binary STL.
How to convert a 3MF file
Drop a .3mf file into the converter, select Convert to STL and wait for the local download. Open the result in your slicer, confirm its dimensions and orientation, then apply print settings there.
FAQ
Questions about 3MF conversion
- Are my 3MF files uploaded?
- No. The file is read by a Web Worker in your browser and the STL is created on your device. The converter has no file-upload step.
- Will the STL keep colors and materials?
- No. Standard STL represents surface triangles, not 3MF color, material or printer metadata.
- Why should I check the scale after conversion?
- 3MF carries explicit unit information while STL does not. This converter normalizes supported 3MF units to millimeters for common slicers, but you should still confirm dimensions before printing.