What is the difference between the installer and portable version?

The Windows Installer (.exe) installs Orca Slicer to your system with Start Menu shortcuts and file associations. The Portable version (.zip) can be extracted and run from any folder, including USB drives, without installation - useful for users who want to keep settings self-contained or use on multiple computers.

Download Orca Slicer

v2.3.1 Released October 2025

Free and open-source 3D printing slicer software. Download the latest stable version for Windows, macOS, or Linux. No registration required, no hidden costs.

Windows

Windows Installer

Standard installation with Start Menu shortcuts, file associations, and automatic updates. Best for most users.

OrcaSlicer_Windows_Installer_V2.3.1.exe ~150 MB

Download Installer

Windows Portable

No installation required. Extract and run from any folder or USB drive. Settings stored locally in the app folder.

OrcaSlicer_Windows_V2.3.1_portable.zip ~150 MB

Download Portable

System Requirements: Windows 10 or Windows 11, 64-bit processor required. Not compatible with Windows 7/8 or 32-bit systems.

macOS

Apple Silicon (M1/M2/M3/M4)

Native build for Apple Silicon Macs. Best performance on M1, M2, M3, M4 chips and their variants (Pro, Max, Ultra).

OrcaSlicer_Mac_Apple_Silicon_V2.3.1.dmg ~120 MB

Download for Apple Silicon

Intel Mac (x86_64)

For older Intel-based Macs. If you're not sure which Mac you have, click Apple menu > About This Mac to check.

OrcaSlicer_Mac_Intel_V2.3.1.dmg ~120 MB

Download for Intel Mac

System Requirements: macOS 11.0 Big Sur or later. On first launch, right-click the app and select "Open" to bypass Gatekeeper security prompt.

Linux

AppImage (Universal)

Works on most Linux distributions without installation. Single executable file - make it executable and run.

OrcaSlicer_Linux_V2.3.1.AppImage ~130 MB

Download AppImage

Flatpak (Sandboxed)

Sandboxed installation via Flatpak. Automatic updates through your software center. Available on Flathub.

via Flathub ~130 MB

Get on Flathub

System Requirements: Ubuntu 22.04 or equivalent distribution. For AppImage, run: chmod +x OrcaSlicer*.AppImage to make it executable.

Nightly Builds (Development Versions)

Warning: Nightly builds contain the latest development features but may be unstable. They are automatically built from the main development branch and may have bugs or incomplete features. Use for testing only - not recommended for production printing.

Nightly builds are useful for testing new features before they're officially released, reporting bugs to developers, or accessing fixes that haven't yet been included in a stable release.

Windows Nightly

Latest development build for Windows. Updated daily with newest changes.

View Windows Nightlies

macOS Nightly

Latest development build for macOS. Available for both Apple Silicon and Intel.

View macOS Nightlies

Linux Nightly

Latest development build for Linux distributions. AppImage format.

View Linux Nightlies

System Requirements

Processor

64-bit CPU required (Intel x64, AMD64, or Apple Silicon). Multi-core processor recommended for faster slicing.

Memory (RAM)

4 GB minimum, 8 GB or more recommended. Large models and multi-plate projects require more memory.

Graphics

OpenGL 2.0 compatible graphics card. Dedicated GPU recommended for smooth 3D viewport performance.

Storage

500 MB available disk space for installation. Additional space needed for projects and G-code files.

Display

1280x720 minimum resolution. 1920x1080 or higher recommended for comfortable workflow.

Network (Optional)

Internet connection for updates, model downloads, and network printing. Core features work offline.

Installation Instructions

Installing Orca Slicer on Windows

Download the Windows Installer (.exe) from the download section above.
Run the installer by double-clicking the downloaded file. If Windows SmartScreen appears, click "More info" then "Run anyway" - the software is safe but may not be recognized because it's open source.
Follow the setup wizard to complete installation. Choose your installation directory (default is recommended).
Launch Orca Slicer from the Start Menu or desktop shortcut. On first launch, you'll be prompted to select your 3D printer.

Tip: For the portable version, simply extract the ZIP file to any folder and run OrcaSlicer.exe directly. Settings will be stored in the same folder.

Installing Orca Slicer on macOS

Download the appropriate DMG file - Apple Silicon for M1/M2/M3/M4 Macs, Intel for older Macs.
Open the DMG file by double-clicking it. A window will appear showing the Orca Slicer application.
Drag Orca Slicer to your Applications folder as indicated in the window.
First launch: Right-click (or Control-click) on Orca Slicer in Applications and select "Open". Click "Open" again in the security dialog. This is only needed the first time.
Select your printer on first launch and you're ready to start slicing!

Tip: If you see "Orca Slicer can't be opened because it is from an unidentified developer", go to System Preferences > Security & Privacy and click "Open Anyway".

Installing Orca Slicer on Linux

Option 1: AppImage (Recommended)

Download the AppImage file from the download section above.
Make it executable by running in terminal: chmod +x OrcaSlicer_Linux_V2.3.1.AppImage
Run the AppImage by double-clicking it or from terminal: ./OrcaSlicer_Linux_V2.3.1.AppImage

Option 2: Flatpak

Install Flatpak if not already installed on your system.
Add Flathub repository: flatpak remote-add --if-not-exists flathub https://flathub.org/repo/flathub.flatpakrepo
Install Orca Slicer: flatpak install flathub com.github.softfever.OrcaSlicer
Run: flatpak run com.github.softfever.OrcaSlicer

Tip: For AppImage integration with your desktop environment, consider using AppImageLauncher.

Recent Releases

Version 2.3.1 Latest October 2025

Added support for Bambu Lab A1 and A1 Mini printers
Improved Klipper Moonraker integration with better error handling
New AI-powered spaghetti detection for compatible cameras
Enhanced scarf joint seam algorithm for cleaner layer transitions
Bug fixes and performance improvements

Version 2.3.0 March 2025

Major UI refresh with improved dark mode support
Added built-in model library integration
New profiles for Creality K2 Plus and QIDI X-Max 3
Improved multi-plate project workflow
Better support for high-speed filaments

Version 2.2.0 October 2024

Added tree supports with improved removal characteristics
Enhanced calibration tools with one-click generation
New profiles for Elegoo Neptune 4 series
Improved STEP file import performance

View All Releases on GitHub

Download & Installation FAQ

Which version should I download for my Mac? ▼

If you have a Mac with an M1, M2, M3, or M4 chip (or their Pro/Max/Ultra variants), download the Apple Silicon version for best performance. If you have an older Intel-based Mac, download the Intel version. To check: click the Apple menu > About This Mac. If it says "Apple M1/M2/M3/M4" you have Apple Silicon; if it says "Intel" you need the Intel version.

What's the difference between installer and portable versions? ▼

The Windows Installer installs Orca Slicer to your Program Files, creates Start Menu shortcuts, associates file types (.3mf, .stl), and stores settings in your user profile. The Portable version runs from any folder without installation - extract the ZIP and run OrcaSlicer.exe directly. Settings are stored in the same folder as the executable, making it ideal for USB drives or users who want self-contained installations.

Windows says the file is not commonly downloaded - is it safe? ▼

Yes, Orca Slicer is safe. Windows SmartScreen shows this warning for any software that isn't frequently downloaded or doesn't have an expensive code signing certificate. Since Orca Slicer is free open-source software, the developers don't purchase expensive certificates. You can verify the software is authentic by checking the download comes from the official GitHub repository. Click "More info" then "Run anyway" to proceed with installation.

Are nightly builds safe to use? ▼

Nightly builds are built from the latest development code and are as safe as stable releases in terms of security. However, they may contain bugs, incomplete features, or experimental changes that could affect print quality or cause crashes. They're recommended for advanced users who want to test new features, help developers find bugs, or need a specific fix that hasn't been released yet. For production printing, stick with stable releases.

Can I have multiple versions of Orca Slicer installed? ▼

Yes! Use the portable version for this purpose. You can have multiple portable versions in different folders (e.g., OrcaSlicer-2.3.1, OrcaSlicer-Nightly) and run whichever you need. Each portable installation maintains its own settings. The installed version uses shared settings in your user profile, while portable versions are completely self-contained.

Where are my settings and profiles stored? ▼

Windows (Installed): %APPDATA%\OrcaSlicer
Windows (Portable): In the data folder next to OrcaSlicer.exe
macOS: ~/Library/Application Support/OrcaSlicer
Linux: ~/.config/OrcaSlicer
Back up this folder to preserve your custom profiles and settings.