Drop an .stl and pack it into a modern .3mf — smaller, structured, slicer-friendly.
100% local · file never leaves your browser
3MF is the modern replacement for STL: a ZIP archive of XML carrying geometry, colors, units, components and metadata. Bambu Studio, PrusaSlicer, Cura and OrcaSlicer all prefer it.
This converter wraps your STL geometry into a minimal valid 3MF — millimeter units, single object. Add colors or per-part settings directly in your slicer afterwards.
The file is parsed in WebAssembly + WebGL on your device. Nothing leaves.
No queue, no upload. Most files convert in well under a second.
Orbit, pan and zoom the result in real time before you commit.
3MF is smaller, carries units, and supports per-part settings — modern slicers default to it.
Not from an STL (it has none). Add them in your slicer after import.
Yes — the geometry block is standard 3MF core 2015/02, opened by every modern slicer.