PrusaSlicer 3D file formats: what opens and how
PrusaSlicer is Prusa Research's free slicer for Prusa printers and many others. It opens 3 of the 9 common 3D formats below without conversion; for the rest, convert to STL first.
Format support at a glance
| Format | Support | How |
|---|---|---|
| GLB | Convert first | Convert to STL |
| glTF | Convert first | Convert to STL |
| OBJ | Built in | File › Import (Ctrl+I) |
| STL | Built in | File › Import › Import STL/3MF/STEP/OBJ/AMF… (Ctrl+I) |
| FBX | Convert first | Convert to STL |
| PLY | Convert first | Convert to STL |
| 3MF | Built in | File › Import (Ctrl+I), or File › Open Project for PrusaSlicer 3MF projects |
| DAE | Convert first | Convert to STL |
| USDZ | Convert first | Convert to STL |
Which format to choose
3MF and STL are the most dependable choice for PrusaSlicer. A PrusaSlicer 3MF keeps print settings along with the model. PrusaSlicer is a slicer, so it only needs the shape: colour and textures are dropped, and anything it can't open converts cleanly to STL.
Units and orientation
PrusaSlicer works in millimetres and is Z-up. Most problems after an import, such as a model that is invisible, enormous or lying on its side, come from a mismatch with the exporting app rather than a broken file.
- Press F to lay a model flat on a selected face, and use the Cut tool (C) to split tall models.
- PrusaSlicer asks to scale tiny models up from inches; check the size panel either way.
Questions
- What 3D formats can PrusaSlicer open?
- Without conversion: OBJ, STL, 3MF.
- How do I get an unsupported format into PrusaSlicer?
- Convert it to STL with one of our in-browser converters, then import the STL. In PrusaSlicer: File › Import › Import STL/3MF/STEP/OBJ/AMF… (Ctrl+I).
- Does PrusaSlicer keep textures and animation?
- PrusaSlicer only uses geometry. Textures, materials and animation are ignored, so a plain STL or 3MF is all you need.
Source: the official PrusaSlicer documentation. Menu names can move between versions.
Written with AI assistance by the Renderlyst team in October 2026. Format support reflects each app's current release as we understand it, and we link the official documentation so you can confirm it for your version. Spotted something out of date? Email alishbakhalid766@gmail.com.