OrcaSlicer is a free, open-source slicer for FDM 3D printers, available for Windows, macOS and Linux. It prepares models for printing with separate speed, layer-height, pressure and temperature controls for walls, infill, supports and other features. Its calibration tools cover flow rate, pressure advance, temperature towers, retraction, tolerance and maximum volumetric speed. The project offers tuned presets for hundreds of printers, including Bambu Lab, Prusa, Creality and Voron. Users can send jobs to and monitor printers running Klipper, PrusaLink or OctoPrint. Other supported tools include automatic supports, model repair, multi-material printing and variable layer height; resin slicing and cloud slicing are not supported. The desktop app works offline without an account or telemetry, and keeps models, project files, G-code and printer settings on the user’s device. Optional connections can enable updates, profiles and printer or cloud services. OrcaSlicer is licensed under AGPL-3.0 and developed openly by SoftFever and community contributors.
Who it is for
OrcaSlicer suits FDM 3D printer owners who want calibration and print controls across supported desktop systems. It may also fit users who prefer offline use without an account or telemetry.
What is good
- Free and open-source under AGPL-3.0
- Calibration tools cover flow, temperature and retraction
- Can send jobs to and monitor supported print hosts
- Supports model repair and variable layer height
What to know first
- Does not support resin slicing
- Cloud slicing is not supported
- Nightly builds may be unstable
Verdict
OrcaSlicer offers extensive FDM calibration and print controls at no cost. Its offline operation is optional integrations aside, while resin and cloud slicing are outside its supported scope.
OrcaSlicer plans and pricing
All plansCompared on 3D printing software
- Free plan
- Yes
- Auto supports
- Yes
- Printer control
- Yes
- Print monitoring
- Yes
- Cloud slicing
- No
- Multi-material tools
- Yes
- Model repair
- Yes
