OrcaSlicer is a free, open-source slicer for FDM 3D printers. It turns 3D models into G-code and ships with presets for many brands, including Bambu Lab, Prusa, Creality and Voron. It began from Bambu Studio and PrusaSlicer and is developed by SoftFever and community contributors under the AGPL-3.0 license.
When to use OrcaSlicer
- You run printers from more than one brand and want one slicer for all of them.
- You want to calibrate a printer or a new filament. OrcaSlicer generates flow rate, pressure advance, temperature, retraction, tolerance and max volumetric speed tests inside the slicer.
- Your printer runs Klipper, PrusaLink or OctoPrint. OrcaSlicer can send jobs to them and monitor them directly.
- You want fine control over walls, seams and supports, including scarf seams, polyholes and sandwich mode.
When not to use it
- From an unofficial website. The project’s README names
orca-slicer[.]comandorcaslicer[.]netas malicious sites pretending to be official. See our OrcaSlicer download guide. - If you only own Bambu printers and rely on Bambu’s cloud features. Bambu Studio is Bambu Lab’s own slicer. OrcaSlicer can drive Bambu printers through Bambu’s optional network plugin, and Bambu’s newer firmware adds its own rules for third-party software. Our comparison explains the differences.
- For day-to-day printing on a nightly build. The project warns that nightly builds may be unstable.
Requirements
From the official download page: Windows 10 or later (64-bit), macOS 10.15 or later, or Ubuntu 20.04+ or an equivalent Linux distribution. It needs 4 GB of RAM (8 GB or more recommended), 500 MB of disk space and, on Windows and Linux, an OpenGL 3.3 compatible graphics card. Windows builds exist for x64 and ARM64. The Mac build is universal.
Verify your download
Download from github.com/OrcaSlicer/OrcaSlicer/releases or from the buttons on www.orcaslicer.com. The GitHub installer is not code-signed, so compare the SHA-256 hash below with Get-FileHash on Windows, shasum -a 256 on macOS or sha256sum on Linux. If you prefer a signed package, install the Microsoft Store build, which the project recommends on Windows. You can also use winget install --id=SoftFever.OrcaSlicer -e or Flathub.
Questions
Is OrcaSlicer free?
Yes. It is open source under the GNU Affero General Public License v3. The project accepts optional donations.
Is orcaslicer.com official?
Yes. The README says www.orcaslicer.com is the only official website. The site also lists cloud.orcaslicer.com.
Does OrcaSlicer need an account?
No. The website says “No account, no telemetry.” OrcaCloud is an optional extra.
Which file do I need?
The x64 installer for most Windows PCs, the ARM64 installer for Windows on ARM, the universal DMG for any Mac, and Flathub or the AppImage matching your CPU on Linux.
