How to Open 3MF Files in PrusaSlicer
PrusaSlicer is Prusa Research's free slicer for Prusa printers and many others.
Short answer · Built in
Yes. PrusaSlicer opens 3MF files as shipped: File › Import (Ctrl+I), or File › Open Project for PrusaSlicer 3MF projects.
Import 3MF into PrusaSlicer, step by step
- 1Check the fileA 3MF is a zipped package that can contain several objects, colours and print settings; don't unzip it before importing.
- 2Import into PrusaSlicerFile › Import (Ctrl+I), or File › Open Project for PrusaSlicer 3MF projects.
- 3Check scale and orientationPrusaSlicer works in millimetres and is Z-up. 3MF files are millimetres, stored in the file, so they normally arrive at the right size.
- 4Place it and sliceLay the flattest face on the plate, confirm the dimensions in the object panel, and slice. Slicers ignore textures and animation.
What comes through
| Shape | Yes, always. |
| Colours and materials | Ignored: PrusaSlicer only uses the shape. |
| Textures | Not used by a slicer. |
| Animation | PrusaSlicer doesn't play animation. |
Things to watch for
- A PrusaSlicer 3MF keeps print settings along with the model.
- Press F to lay a model flat on a selected face, and use the Cut tool (C) to split tall models.
Questions
- Does PrusaSlicer support 3MF files?
- Yes. PrusaSlicer opens 3MF files as shipped: File › Import (Ctrl+I), or File › Open Project for PrusaSlicer 3MF projects.
- Why is my 3MF model the wrong size in PrusaSlicer?
- 3MF files are millimetres, stored in the file, while PrusaSlicer works in millimetres. PrusaSlicer asks to scale tiny models up from inches; check the size panel either way.
- What is the best 3D format for PrusaSlicer?
- 3MF and STL are the most reliable choice for PrusaSlicer. 3MF is one of them, so you're already using a good option.
Menu names follow Prusa Research's current release. Check the official PrusaSlicer documentation if your version differs.
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 Spotted something out of date?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.