Convert AMF to 3MF
Convert a AMF file to 3MF in your browser. Free, no upload, no sign-up.
Convert AMF files to 3MF directly in your browser. The converter parses the AMF mesh, rebuilds it in memory and writes it out as 3MF, keeping every triangle. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. 3MF records the unit and can hold several objects with colors, so the model opens in the slicer at the right size without guessing.
How to convert AMF to 3MF
- 1Drop your AMF file
Drag a .amf file onto the box above or click to choose one. Plain and ZIP-compressed AMF files are read; curved-triangle data is flattened.
- 2Check the preview
The model renders in 3D so you can confirm it loaded correctly. Dimensions, volume and triangle count are shown next to it; open edges are flagged if the mesh is not watertight.
- 3Download the 3MF
Adjust the export options if needed and click download. The exported file declares millimeters as its unit and contains the mesh as a single object.
What is a AMF file?
AMF is an XML format standardised as ISO/ASTM 52915 as an intended successor to STL. It supports units, colors, materials and curved triangles. Adoption stayed limited and most of the industry moved on to 3MF, but slicers still accept AMF files.
Commonly used by: older slicers, ASTM / ISO 52915 workflows
Plain and ZIP-compressed AMF files are read; curved-triangle data is flattened.
What is a 3MF file?
3MF is the modern replacement for STL, published by the 3MF Consortium (Microsoft, Autodesk, HP, Prusa and others). It is a ZIP archive containing XML that stores units, colors, materials, multiple objects and print settings. Slicers such as Bambu Studio and PrusaSlicer use it as their project format.
Commonly used by: Bambu Studio, PrusaSlicer, Cura, Windows 3D Builder, Fusion 360
3MF records the unit and can hold several objects with colors, so the model opens in the slicer at the right size without guessing.
AMF vs 3MF
| AMF | 3MF | |
|---|---|---|
| Full name | Additive Manufacturing File | 3D Manufacturing Format |
| Encoding | Text | ZIP container |
| Geometry type | Triangle mesh | Triangle mesh |
| Colors | Yes | Yes |
| Textures | No | Yes |
| Materials | Yes | Yes |
| Stores units | Yes | Yes |
| Multiple objects | Yes | Yes |
| Typical use | older slicers, ASTM / ISO 52915 workflows | Bambu Studio, PrusaSlicer, Cura |