What it does
PrusaSlicer is free, open-source desktop software for preparing FDM and mSLA prints. It supports Prusa and other manufacturers' printers, with printer/material profiles, model preparation and toolpath previews.
The stable 2.9 workflow starts by importing STL, STEP, 3MF, OBJ or AMF through Add, File > Import or drag-and-drop. Rotate adjusts orientation, while Place on Face aligns a selected model face with the virtual bed. Select the actual printer and nozzle profile, then the material and layer-height profile.
Support choices include Everywhere and On build plate only. Infill controls the interior structure; a brim adds outlines to the first layer to increase its contact with the bed. These settings answer different problems, so inspect their effect in the sliced result.
Choose Slice now to enter Preview. The layer slider reveals individual levels, including areas that would begin in mid-air without support. After checking the result, use Export G-code. With removable media present, Export to SD/USB drive opens a save dialog at that device; Eject appears after export.
PrusaSlicer runs locally on Windows, Mac and Linux without an account. Simple, Advanced and Expert modes expose different amounts of control. The product page currently separates the stable 2.9.6 release from the experimental 3.0 preview, which it does not recommend for production. EasyPrint's phone/browser interface is a separate service using the slicing engine.
Strengths
- Model orientation, support choices and layer inspection are available before file export.
- Local slicing requires neither an account nor a cloud connection.
Watch out for
- The 3.0 preview is experimental and is not recommended for production by its developer.
- Unsupported areas can remain in a sliced model unless suitable supports are enabled.
Best for
- Preparing filament prints with inspected supports and infill
- Local slicing for supported FDM and resin printers
Sources
- PrusaSlicer | Desktop Product and Release Tracks (Oct 28, 2026)
- PrusaSlicer | Official Repository (Oct 28, 2026)
- PrusaSlicer2.9 | First Print Preparation and Export (Oct 28, 2026)