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Open Source LEGO CAD


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About LeoCAD

LeoCAD is a CAD program for creating virtual LEGO(R) models. It's available
for free under the GNU Public License v2 and works on the Windows, Linux
and macOS Operating Systems.
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You can download the latest version of LeoCAD and its Parts Library from the main website at

It's recommended that you install the latest drivers for your video card since LeoCAD uses OpenGL to take advantage of hardware acceleration for rendering.

LeoCAD for Windows

Download the latest LeoCAD-Windows.exe to your computer, double click on the icon to launch the installer and follow the instructions.

LeoCAD for Linux

There are multiple ways to install LeoCAD on Linux.

  • Snap Store
    You can find LeoCAD in your distribution's Snap Store. Alternatively, you can enter sudo snap install leocad to install it using the command line.

  • AppImage
    Download the latest LeoCAD-Linux.AppImage, make the file executable (chmod +x) and run it.

  • Flatpak
    You can also install LeoCAD releases as a Flatpak from Flathub:
    Note: there might be a delay for new releases to appear there. If you have it already installed, it will be updated.

  • From source
    If you prefer to compile LeoCAD yourself, go to the GitHub releases page at and download the source archive from there. If you do not already have a Parts Library installed, you will need to download one and follow the installation instructions. More information on how to compile your own executable is available in the Documentation section of

LeoCAD for macOS

Download the latest LeoCAD-macOS.dmg to your computer, double click on the icon to open the archive, copy to your Applications folder and then launch it from there.

New users should read the online tutorial located at to learn how to use LeoCAD.

Online Resources

Legal Disclaimer

LEGO(R) is a trademark of the LEGO Group of companies which does not sponsor,
authorize or endorse this software.

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