OrcaSlicer: an open source Next-Gen Slicing Software for Precision 3D Prints.
Optimize your prints with ultra-fast slicing, intelligent support generation, and seamless printer compatibility—engineered for perfection.

Official links and community

Official Website:

OrcaSlicer.com

Github Repository:

Follow us:

Join our Discord community:

⚠️ CAUTION: Several clickbait and malicious websites, such as orca-slicer[.]com and orcaslicer[.]net, are pretending to be the official OrcaSlicer site. These sites may redirect you to dangerous downloads or contain misleading information. Our only official website is www.orcaslicer.com. If you come across any of these in search results, please report them as unsafe or phishing to help keep the community secure with: - Google Safe Browsing - Microsoft Security Intelligence - IPThreat

Main features

• Advanced Calibration Tools
  Comprehensive suite: temperature towers, flow rate, retraction & more for optimal performance.
• Precise Wall and Seam Control
  Adjust outer wall spacing and apply scarf seams to enhance print accuracy.
• Sandwich Mode and Polyholes Support
  Use varied infill patterns and accurate hole shapes for improved clarity.
• Overhang and Support Optimization
  Modify geometry for printable overhangs with precise support placement.
• Granular Controls and Customization
  Fine-tune print speed, layer height, pressure, and temperature with precision.
• Network Printer Support
  Seamless integration with Klipper, PrusaLink, and OctoPrint for remote control.
• Mouse Ear Brims & Adaptive Bed Mesh
  Automatic brims and adaptive mesh calibration ensure consistent adhesion.
• User-Friendly Interface
  Intuitive drag-and-drop design with pre-made profiles for popular printers.
• Open-Source & Community Driven
  Regular updates fueled by continuous community contributions.
• Wide Printer Compatibility
  Supports a broad range of printers: Bambu Lab, Prusa, Creality, Voron, and more.
• Belt Printer Support
  Slice for belt / conveyor (infinite-Z) printers, with belt-aware supports and a tilted-bed preview. Contributed by Joseph Robertson (@HarrierPigeon).
• IDEX/IQEX Parallel Printing Support
  Print copies or mirror images of a part on every carriage of an IDEX or IQEX printer at once, with the mode chosen per plate and nozzle clearance zones shown on the bed. Contributed by Clifford (@cgarwood82).
• Additional features can be found in the change notes.

Wiki

The wiki aims to provide a detailed explanation of the slicer settings, including how to maximize their use and how to calibrate and set up your printer.

• Access the wiki here
• Contribute to the wiki

Download

🌙 Download the Latest Fork Build

This fork's builds are published to the rolling Nightly-Rolling release. Download the installer or package for your platform below, or visit the releases page for all assets.

How to install

Windows

Download the Windows Installer exe for your CPU: x64 or ARM64.

• Portable builds are also available on the releases page.

  Troubleshooting

  • If you have troubles to run the build, you might need to install following runtimes:
  • MicrosoftEdgeWebView2RuntimeInstallerX64
    • Details of this runtime
  • Visual C++ Redistributable x64
    • This file may already be available on your computer if you've installed visual studio. Check the following location: %VCINSTALLDIR%Redist\MSVC\v142

Mac

1. Download the universal DMG, which runs on both Apple Silicon and Intel Macs.

2. Drag OrcaSlicer.app to Application folder.

3. If you want to run a build from a PR, you also need to follow the instructions below:

   Quarantine

   • Option 1 (You only need to do this once. After that the app can be opened normally.):

     • Step 1: Hold cmd and right click the app, from the context menu choose Open.
     • Step 2: A warning window will pop up, click Open

   • Option 2: Execute this command in terminal:

     xattr -dr com.apple.quarantine /Applications/OrcaSlicer.app

   • Option 3:

     • Step 1: open the app, a warning window will pop up
       
     • Step 2: in System Settings -> Privacy & Security, click Open Anyway:
       

Linux

Flatpak

Download this fork's Flatpak bundle for your CPU: x86_64 or aarch64 (ARM64).

Install the downloaded bundle from the command line (replace the filename for ARM64):

flatpak install --user ./OrcaSlicer-Linux-flatpak_nightly_x86_64.flatpak
flatpak run com.orcaslicer.OrcaSlicer

AppImage

AppImages are published for both x86_64 and aarch64 (ARM64). Pick the file matching your CPU — the ARM64 build has aarch64 in its name (e.g. OrcaSlicer_Linux_AppImage_Ubuntu2404_aarch64_*.AppImage).

1. Download the AppImage for your CPU: x86_64 or aarch64 (ARM64).

2. Double click the downloaded file to run it.

3. If you run into trouble executing it, try this command in the terminal: chmod +x /path_to_appimage/OrcaSlicer_Linux.AppImage

How to Compile

All updated build instructions for Windows, macOS, and Linux are now available on the official OrcaSlicer Wiki - How to build page.

Please refer to the wiki to ensure you're following the latest and most accurate steps for your platform.

Klipper Note

If you're running Klipper, it's recommended to add the following configuration to your printer.cfg file.

# Enable object exclusion
[exclude_object]

# Enable arcs support
[gcode_arcs]
resolution: 0.1

Supports

OrcaSlicer is an open-source project, and we're deeply grateful to all our sponsors and backers.
Their generous support helps fund filaments and other essential 3D printing materials for the project.
Thank you! :)

Sponsors

Backers:

Ko-fi supporters ☕: Backers list

Support the project

Some Background

Open-source slicing has always been built on a tradition of collaboration and attribution. Slic3r, created by Alessandro Ranellucci and the RepRap community, laid the foundation. PrusaSlicer by Prusa Research built on Slic3r and acknowledged that heritage. Bambu Studio in turn forked from PrusaSlicer, and SuperSlicer by @supermerill extended PrusaSlicer with community-driven enhancements. Each project carried the work of its predecessors forward, crediting those who came before.

OrcaSlicer began in that same spirit, drawing from BambuStudio, PrusaSlicer, and ideas inspired by CuraSlicer and SuperSlicer. But it has since grown far beyond its origins. Through relentless innovation — introducing advanced calibration tools, precise wall and seam control, tree supports, adaptive slicing, and hundreds of other features — OrcaSlicer has become the most widely used and actively developed open-source slicer in the 3D printing community. Many of its innovations have been adopted by other slicers, making it a driving force for the entire industry.

The OrcaSlicer logo was designed by community member Justin Levine.

License

• OrcaSlicer is licensed under the GNU Affero General Public License, version 3.
• The GNU Affero General Public License, version 3 ensures that if you use any part of this software in any way (even behind a web server), your software must be released under the same license.
• OrcaSlicer includes a pressure advance calibration pattern test adapted from Andrew Ellis' generator, which is licensed under GNU General Public License, version 3. Ellis' generator is itself adapted from a generator developed by Sineos for Marlin, which is licensed under GNU General Public License, version 3.
• The Bambu networking plugin is based on non-free libraries from BambuLab. It is optional to the OrcaSlicer and provides extended functionalities for Bambulab printer users.