What is OrcaSlicer used for?

OrcaSlicer is an open-source slicer that turns 3D models into G-code for printers from Bambu, Prusa, Voron, Creality and others. It is a good fit for preparing models for Bambu or Prusa printers and calibrating a printer for better print quality.

Is OrcaSlicer open source?

Yes. OrcaSlicer is open source under the AGPL-3.0 licence. Its source code is on GitHub at OrcaSlicer/OrcaSlicer and is written mainly in C++.

Yes. OrcaSlicer is open source, so the software itself is free to use.

Can I self-host OrcaSlicer?

Yes. OrcaSlicer can be self-hosted on your own server or infrastructure; there is no official hosted version.

What is OrcaSlicer an alternative to?

OrcaSlicer is an open-source alternative to Simplify3D. Other open-source alternatives to Simplify3D include PrusaSlicer and UltiMaker Cura.

Is OrcaSlicer actively maintained?

Yes. The most recent commit to OrcaSlicer was on 2 October 2026, and the latest release is v2.4.2, published on 7 July 2026. The project has 16k stars on GitHub.

OrcaSlicer: open-source alternative to Simplify3D

About OrcaSlicer

OrcaSlicer is slicing software for 3D printing. It converts 3D models into G-code instructions for a printer, with profiles for printers from makers such as Bambu, Prusa, Voron, VzBot, RatRig and Creality. It is written in C++, released under the AGPL-3.0 license and developed with a community of makers.

Features include a suite of calibration tools such as temperature towers, flow rate and retraction tests, precise wall and seam control with scarf seams, sandwich mode and polyholes support, overhang and support optimization, and granular control over speed, layer height, pressure and temperature. Mouse ear brims and adaptive bed mesh calibration help first-layer adhesion.

Network printer support covers Klipper, PrusaLink and OctoPrint for remote control, and the interface offers drag-and-drop with pre-made printer profiles. The project warns that several look-alike websites impersonate it and names orcaslicer.com as the only official site, so downloads should come from there or the GitHub repository.

Key features

G-code generation for many 3D printers
Calibration tools for temperature and flow
Wall and seam control with scarf seams
Support and overhang optimization
Klipper, PrusaLink and OctoPrint support
Pre-made profiles for popular printers

Good fit for

→Preparing models for Bambu or Prusa printers
→Calibrating a printer for better print quality

Built with: C++
Tags: 3d-printing; slicer; g-code; 3d-printer; makers; calibration; klipper; cpp

OrcaSlicer: questions and answers

What is OrcaSlicer used for?: OrcaSlicer is an open-source slicer that turns 3D models into G-code for printers from Bambu, Prusa, Voron, Creality and others. It is a good fit for preparing models for Bambu or Prusa printers and calibrating a printer for better print quality.
Is OrcaSlicer open source?: Yes. OrcaSlicer is open source under the AGPL-3.0 licence. Its source code is on GitHub at OrcaSlicer/OrcaSlicer and is written mainly in C++.
Is OrcaSlicer free?: Yes. OrcaSlicer is open source, so the software itself is free to use.
Can I self-host OrcaSlicer?: Yes. OrcaSlicer can be self-hosted on your own server or infrastructure; there is no official hosted version.
What is OrcaSlicer an alternative to?: OrcaSlicer is an open-source alternative to Simplify3D. Other open-source alternatives to Simplify3D include PrusaSlicer and UltiMaker Cura.
Is OrcaSlicer actively maintained?: Yes. The most recent commit to OrcaSlicer was on 2 October 2026, and the latest release is v2.4.2, published on 7 July 2026. The project has 16k stars on GitHub.