Convert AMF to STL
Convert AMF files to STL in your browser. Free, no upload, no sign-up.
Convert AMF files to STL directly in your browser. The converter parses the AMF mesh, rebuilds it in memory and writes it out as STL, triangle for triangle. STL records shape and nothing else, so the colors, materials, the unit definition and separate objects (they are merged into one mesh) in the AMF file do not come across. The two describe the same kind of mesh, so what changes is the container: AMF is a text file you can open in an editor, STL is either text or binary. Nothing is uploaded, there is no file size limit beyond your computer's memory, and the result downloads instantly. STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
How to convert AMF to STL
- 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 STL
Adjust the export options if needed and click download. Colors, textures and materials are dropped because STL cannot store them. Multiple objects are merged into one triangle soup; units are not recorded, so make sure the model is already in millimeters.
What are AMF files?
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 are STL files?
STL is the oldest and most widely supported 3D printing format. It stores nothing but a list of triangles, with no color, texture, unit or scale information. Every slicer and almost every 3D tool can read it, which is why it is still the default exchange format for printable models.
Commonly used by: 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables
STL is accepted by every slicer and 3D printer, so it is the safest format to hand to anyone who needs to print your model.
AMF vs STL
| AMF | STL | |
|---|---|---|
| Full name | Additive Manufacturing File | Stereolithography |
| Encoding | Text | Text or binary |
| Geometry type | Triangle mesh | Triangle mesh |
| Colors | Yes | No |
| Textures | No | No |
| Materials | Yes | No |
| Stores units | Yes | No |
| Multiple objects | Yes | No |
| Typical use | older slicers, ASTM / ISO 52915 workflows | 3D printer slicers (Cura, PrusaSlicer, Bambu Studio), CAD export, Thingiverse / Printables |