stl to 3mf
Convert STL to 3MF
Free STL to 3MF converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the 3MF.
Good to know
3MF stores units, so the slicer cannot misread millimeters as inches. Bambu Studio and PrusaSlicer open it as a project.
How it works
- 1Drop your STL file in the box above. It is read in your browser.
- 2Check the preview and the size. If the STL came in meters or inches, set the scale.
- 3Download the 3MF. It opens in Bambu Studio, PrusaSlicer, and OrcaSlicer.
What carries over
- Shape
- Kept
- Colors
- Dropped
- Materials
- Dropped
- Units
- Dropped
- Separate parts
- Dropped
- Exact curves
- Dropped
About STL
STL (Stereolithography). The default 3D printing format since 1987: a bare list of triangles. Every slicer reads it, but it has no units, no color, and no parts.
Units: None in the file. Slicers read the numbers as millimeters. Up axis: Z. Opens in Bambu Studio, PrusaSlicer, Cura, OrcaSlicer, and Blender.
About 3MF
3MF (3D Manufacturing Format). The modern printing format from the 3MF Consortium. A zip with named parts, units, colors, and slicer settings. Bambu, Prusa, and Orca save projects in it.
Units: Explicit. Usually millimeters. Up axis: Z. Opens in Bambu Studio, PrusaSlicer, OrcaSlicer, Cura, and Windows.
Questions
- Is the STL to 3MF converter free?
- Yes. You get 3 runs a month without an account. Sign in with your email, free, and there is no limit.
- Is my file uploaded?
- No. The file is read and converted in your browser. It never reaches our servers.
- Will the 3MF keep colors and materials?
- Where the STL has them, yes.
- What units is the 3MF in?
- STL: None in the file. Slicers read the numbers as millimeters. 3MF: Explicit. Usually millimeters. The converter does not guess. Use the scale option if the size looks wrong.
- How do I open a 3MF file?
- Bambu Studio, PrusaSlicer, OrcaSlicer, Cura, and Windows all open 3MF.
Related tools
All tools- Convert 3MF to STLFree 3MF to STL converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the STL.
- Convert STL to OBJFree STL to OBJ converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the OBJ.
- Convert STL to GLBFree STL to GLB converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the GLB.
- Convert STL to USDZFree STL to USDZ converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the USDZ.
- Convert STL to STEPFree STL to STEP converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the STEP.
- STL viewer onlineOpen STL files in your browser. Measure distances and holes, cut a section, check it is watertight, and see the print weight. No install, nothing uploaded.
- 3MF viewer onlineOpen 3MF files in your browser. Measure distances and holes, cut a section, check it is watertight, and see the print weight. No install, nothing uploaded.
- Convert OBJ to STLFree OBJ to STL converter. Runs in your browser, so the file never leaves your computer. Preview the model, then download the STL.