Free 3D file converter · no upload
Convert 3MF to STL without uploading your model
Turn a 3MF file into a binary STL on your device. No account, no server queue and no copy of your design left online.
3MF → STL
Convert on this device
Three focused tools
Convert the format you have into the format you need
Each converter uses a format-specific Three.js loader and exports locally. Pick a pair to see its exact limitations before you convert.
Convert 3MF to STL in your browser
Convert 3MF to binary STL in your browser. Free, private, no upload and no account. Multi-part geometry is combined into one printable STL.
Convert GLB to STL for 3D printing
Convert GLB to binary STL locally in your browser. Extract mesh geometry for 3D printing without uploading the model.
Convert FBX geometry to OBJ locally
Convert FBX geometry to OBJ locally in your browser. No upload, no account and no server copy of your 3D model.
Convert 3MF to OBJ in your browser
Convert 3MF to OBJ in your browser. Free, private, no upload and no account required. Your file never leaves your device.
Convert GLB to OBJ in your browser
Convert GLB to OBJ in your browser. Free, private, no upload and no account required. Your file never leaves your device.
Convert FBX to STL in your browser
Convert FBX to STL in your browser. Free, private, no upload and no account required. Your file never leaves your device.
Convert glTF to STL in your browser
Convert glTF to STL in your browser. Free, private, no upload and no account required. Your file never leaves your device.
Convert glTF to OBJ in your browser
Convert glTF to OBJ in your browser. Free, private, no upload and no account required. Your file never leaves your device.
Your CAD file stays in this browser tab
The converter reads and writes the model with a Web Worker in your browser. There is no upload endpoint, temporary cloud bucket or account history to clean up later.
✓ Input parsed locally
✓ No account or server request
✓ Close the tab to clear the session