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A LITTLE LESS FILE FRICTION

STL to 3MF. Ready for your next print.

Preview your STL, confirm its units, and turn it into a 3MF file for free.

Completely free No sign-up No file uploads
Your next file starts here Private workspace

Drop your file here

We’ll detect its format automatically.

or
STL, DXF, faceted STEP · One file, up to 20 MB
3D MODEL PREVIEW
  1. 1Choose file
  2. 2Preview & convert
  3. 3Download
ALL ON YOUR DEVICE
FEWER SURPRISES

See it before you convert it.

Check the shape, size, and any import warnings. We show what can be kept before you download.

What can I open?

STL meshes, supported DXF drawings, and faceted STEP files.

What can I download?

Models: 3MF, STL, or faceted STEP.
Drawings: SVG or DXF.

CAD ModelerMade for the drawing. And what comes next.

What does the 3MF file keep?

The export keeps the triangle geometry and declares its physical units. STL does not record units, so confirm millimetres, centimetres or inches before converting. Materials, textures and original CAD features are not recovered; this is a geometry-only 3MF, not a slicer project.

Do my files leave this device?

Conversion runs locally in your browser. No account or file upload is needed. Choose one file up to 20 MB, check its preview and any warnings, then download the result. Keep this page open while it works.