PrusaSlicer

PrusaSlicer is a free, open-source slicer from Prusa Research. It turns 3D models into printing instructions for filament (FDM) printers and for masked-SLA resin printers. It is best known for Prusa’s filament printers, but it also has a full resin mode for the Original Prusa SL1 and SL1S SPEED, with SLA supports, a pad, hollowing and drain holes. Dental users meet it when they print study and thermoforming models on an SL1S, or quick models on a filament printer. Anyone searching for “PrusaSlicer download” can get it for Windows, macOS and Linux at no cost.

The code is on GitHub under the GNU AGPL-3.0 licence. PrusaSlicer is based on Slic3r, and its code has been taken up by other slicers: Prusa itself names Bambu Studio and OrcaSlicer as PrusaSlicer forks. A completely redesigned PrusaSlicer 3.0 is in public alpha testing. The stable release for daily work is 2.9.6.

PrusaSlicer at a glance

What it does

• An SLA/mSLA mode with bundled profiles for the Original Prusa SL1 and SL1S SPEED. Version 2.9.6 also includes resin profiles for the Anycubic Photon Mono, Mono X, Mono X 6K and Mono SE.
• SLA supports, including tree-like supports with thin tips that are easy to remove, and a pad under the part.
• Hollowing (PrusaSlicer 2.2 and newer) with drain holes that you place by clicking on the model. Hollowing can be set per object or for the whole print.
• Tools to arrange, cut and orient objects, and a layer-by-layer preview before printing.
• A full filament mode with multi-material printing. Version 2.9.6 adds ColorMix, which mixes filament colours by alternating materials between layers.
• More than one project open at once, with multiple beds in one project.
• A command-line interface for automated slicing, and integration with Prusa Connect and Printables.

How dental teams use it

Print dental models on an SL1S

Prusa says its Prusament Resin Model line was tuned for “dental and stomatology applications”. It names the Alabaster White, Solid Grey and Neutral Beige colours as especially suited to dental models and to heat-shaping and thermoforming orthodontic models.

1. In the Configuration Wizard, add the Original Prusa SL1S SPEED and the resin you use.
2. Import the based model STL from your scanner or model software, for example Medit Link.
3. Orient the model. Prusa’s help centre stresses that orientation is critical for SLA print quality.
4. If you hollow the model, add at least two drain holes with the hollowing tool, so that uncured resin can escape.
5. Generate supports and a pad (or place a flat-based model directly on the platform), check the preview, and export or send the job to the printer.

Print quick study models on a filament printer

For patient-education or reference models where fine detail matters less, the filament mode can print an arch on a Prusa or other supported FDM printer. For thermoforming aligners, retainers or anything that needs an accurate fit, resin printing is the usual choice.

Install and first run

• Windows and macOS: Prusa recommends installing from the PrusaSlicer page on prusa3d.com. The same builds (installer, ZIP and DMG) are on the GitHub releases page.
• Linux: Flathub (com.prusa3d.PrusaSlicer) is now the only official Linux distribution channel.
• On first start, the Configuration Wizard asks which printers and materials you use. Choose the SLA printer to switch the interface to resin mode.

Prusa’s knowledge base asks for graphics that support OpenGL 2.0 or newer, at least 4 GB RAM (8 GB or more recommended) and a multi-core CPU, because slicing is multi-threaded. If you try the 3.0 alpha, it stores its profiles in a separate “PrusaSlicer3-dev” folder, so it can run alongside 2.9.6 without affecting your settings.

Limitations

• Resin profiles are bundled for only a few printers: the Prusa SL1 and SL1S and several older Anycubic Photon Mono models. Most other resin printers need their own slicer.
• It has no dental presets, automatic dental orientation or scan-to-model tools.
• It lacks the automatic dental setups of dedicated tools such as CHITUBOX Dental or the Dental Workspace in Formlabs PreForm.
• The 3.0 alpha is incomplete and unstable, so stay on 2.9.6 for production work.

PrusaSlicer vs alternatives

For most third-party resin printers, CHITUBOX or Lychee Slicer are the practical choices. Both have free tiers, and CHITUBOX has a paid dental mode. Anycubic Photon Workshop is free for Anycubic printers. Labs using Formlabs printers work in PreForm, which has a dedicated Dental Workspace. PrusaSlicer’s advantages are that it is fully open source, has no paid tiers and handles both FDM and resin printing in one application.

FAQ

Is PrusaSlicer free?

Yes. PrusaSlicer is free and open source under the GNU AGPL-3.0 licence, with no paid edition.

Is there PrusaSlicer for Mac?

Yes. Prusa publishes a macOS DMG for each release, on prusa3d.com and on GitHub.

How do I install PrusaSlicer on Linux?

Install it from Flathub (com.prusa3d.PrusaSlicer). Prusa now uses Flathub as its only official Linux distribution channel.

Can PrusaSlicer slice for resin printers?

Yes. It has an SLA mode with supports, pad, hollowing and drain holes. Bundled profiles cover the Prusa SL1 and SL1S SPEED and several Anycubic Photon Mono models.

What is PrusaSlicer 3.0?

It is a redesigned version with a new interface, a new print profile system and multi-bed projects. It is still in alpha. Prusa warns that it is unstable and not yet as complete as 2.9.6.

PrusaSlicer vs OrcaSlicer?

Prusa names OrcaSlicer, like Bambu Studio, as a PrusaSlicer fork. OrcaSlicer is a community project for filament printers. For Prusa resin printers, PrusaSlicer is the official tool.

Last checked against official sources: 28 September 2026 (developer website: prusa3d.com). Versions and licence terms change — confirm on the developer's site before deploying in a clinic.