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PrusaSlicer introduction & download

PrusaSlicer (formerly known as Slic3r Prusa Edition or Slic3r PE) is our own in-house developed slicer software based on the open-source project Slic3r. PrusaSlicer is an open-source, feature-rich, frequently updated tool that contains everything you need to export the perfect print files for your Original Prusa 3D printer.

PrusaSlicer is available for Windows, Mac, Linux and we even provide builds for ARM devices and Chromebooks.



Get PrusaSlicer 2.4.2 now! Windows PrusaSlicer Standalone

This is our new (experimental) installer. Sample objects are an optional download and it features a new auto-updater for PrusaSlicer. Please report any bugs to

Windows Drivers & Apps Package Full Installer Mac Drivers & Apps Package Full Installer Linux Drivers & Apps Package Full Installer

The Linux Appimage can also be installed on ChromeOS machines, check our Chromebook installation guide.

Full release log and the latest unstable builds on Github


Video guides









Main features

Learn more about all PrusaSlicer features in our detailed documentation.


Free and open-source

PrusaSlicer is based on Slic3r by Alessandro Ranellucci. It's completely free and open-source. Thanks to the strong community and core team of developers in Prusa Research we can continually add new functionality. You can follow the development process on Github.

Clear & simple UI

Slic3r was always known to be powerful and versatile, but some features were difficult to use, if not outright hidden behind obscure menus and dialogs. We've reworked the UI and tried to expose all the power features while making the UI clear and simple to use at the same time.

Custom supports

Paint custom supports directly on the model! Or block automatically generated supports in selected areas. You can also use custom meshes as support blockers and enforcers. Everything is neatly saved in the project file, always customizable.


MSLA & multi material support

With the release of our Original Prusa SL1 resin 3D printer, we’ve added masked SLA (MSLA) mode into PrusaSlicer. As far as we know, PrusaSlicer is the first high-quality open-source MSLA slicer available. PrusaSlicer also supports multi material FFF printing with the Original Prusa MMU2S.

Auto-updating profiles

Testers and developers at Prusa Research are constantly working on presets for 150+ filaments and resins. We are adding profiles on regular basis, following materials by the most popular manufacturers. You will get new profiles automatically through auto-update function.

Smooth variable layer height

3D printing is always about the quality versus the print time. In PrusaSlicer, you can select the layer height for each part of the object separately. Our software takes care of smoothing so the final print looks best as it can and the printing time remains acceptable. Check out the video.


Firmware flasher

PrusaSlicer includes built-in firmware flasher for Original Prusa i3 printers. You can just connect your printer to computer via USB cable and easily flash the firmware via PrusaSlicer. Don't forget to upgrade your printer regularly! 😉

Color change

You can prepare prints with color change directly in PrusaSlicer. Just insert the “pause for filament change” code at layers which you marked in the print preview screen. A preview is displayed instantly so you’ll see exactly how your model will look with color-change.

Send G-code over network

Send G-code directly to your printer with a single click of a button. We support Octoprint, Repetier Host, FlashAir SD cards and more! PrusaSlicer also works with advanced features of Octoprint like upload queue or Cancelobject plugin, which allows you to cancel printing of one particular object on the print bed.


Paint-on seam

Specify where the layer change seam will be located with a simple paint tool. In combination with the seam hiding algorithm, the seam is often nearly invisible.

Built-in 3rd party profiles

Thanks to the help of our wonderful community, we're growing the collection of fine-tuned 3rd party printer profiles.

Print time/feature analysis

The legend in the preview shows a breakdown of the print time by feature. Change any of the settings and watch how the print time changes.

More features

  • Move, rotate and scale gizmos + object manipulation sidebar
  • Object list, copy & paste, scene hierarchy, and instances
  • File/Save Project saves a 3MF file containing all objects, settings, modifiers and their parameters.
  • HiDPI support – Correct scaling on high-resolution displays
  • Manipulation of multiple objects - group selection
  • Background processing – redesigned to work reliably, only those slicing steps that were invalidated by the user action will be re-sliced
  • Repairing models via Netfabb (only on Windows)
  • Wipe into infill, wipe into object in MMU mode
  • Soluble interface supports
  • Multi-language support: English, French, Italian, German, Spanish, Czech, Polish, Ukrainian, Korean, Chinese (Simplified)

PrusaSlicer G-code Viewer

A lightweight application, which you can use to quickly preview G-codes from all popular slicers.

Its behavior is identical to the preview in PrusaSlicer (the same code is used), however, you can load an external G-code file.
We currently parse, and up to some level interpret, G-code from PrusaSlicer, Slic3r, Slic3r PE, CURA, ideaMaker, Simplify3D, Craftware and KISSSlicer. PrusaSlicer G-code Viewer is part of the PrusaSlicer installer package. Simply download the latest PrusaSlicer and the standalone G-code Viewer will install together with it automatically.


Found a bug? Let us know on Github or via community forum