• Table of contents
  • Features
  • Requirements
  • Troubleshooting
  • Downloads
    • Package Manager
    • Nightly builds (unstable)
  • Pictures of Logisim-evolution
  • More Information
  • Bug reports & feature requests
  • For developers
  • How to contribute
  • Credits

Logisim-evolution is educational software for designing and simulating digital logic circuits. Logisim-evolution is free, open-source, and cross-platform.

Project highlights:

• easy to use circuit designer,
• logic circuit simulations,
• chronogram (to see the evolution of signals in your circuit),
• electronic board integration (schematics can be simulated on real hardware),
• VHDL components (components behavior can be specified in VHDL!),
• TCL/TK console (interfaces between the circuit and the user),
• huge library of components (LEDs, TTLs, switches, SoCs),
• allows for custom libraries to be loaded on startup
• supports multiple languages,
• and more!

Getting started (no experience needed):

Step-by-step first circuit:

Key ideas in plain language:

If you get stuck:

• Click a component and read its properties panel.
• Use Edit → Undo to step back safely.
• Check the screenshots and docs links below for examples.

Image gallery: the three thumbnails above link to a larger set of screenshots in docs/pics.md.

Logisim-evolution is a Java application; therefore, it can run on any operating system supporting the Java runtime enviroment. It requires Java 21 (or newer).

Accessibility notes:

• If you use a screen reader, the docs/ pages are plain Markdown and generally read well in linear order.
• If you prefer larger text or higher contrast, use your OS display settings or Java accessibility options.
• Keyboard navigation is supported throughout the app; consult the in-app help for shortcuts.
• The image gallery uses thumbnails that link to full-size images for better visibility.

Accessibility quick setup:

With some non-reparenting window managers, the Logisim-evolution window may appear blank even though its controls still respond. This is caused by an interaction between Java AWT and the window manager. Try launching the JAR once with the following environment variable:

env _JAVA_AWT_WM_NONREPARENTING=1 java -jar logisim-evolution-<version>-all.jar

If this resolves the problem, configure the same environment variable in the session or launcher used to start Logisim-evolution. See issue #1235 for background and confirmed configurations.

Logisim-evolution is available for download in compiled form with ready to use installable packages for Windows, macOS, and Linux or in source code form, which you can build yourself.

The following platform specific packages include the Java runtime and do not require it to be installed separately:

• logisim-evolution_<version>-1_amd64.deb: Debian package (also suitable for Ubuntu and derivatives),
• logisim-evolution-<version>-1.x86_64.rpm: Package for Fedora/Redhat/CentOS/SuSE Linux distributions,
• logisim-evolution-<version>_amd64.snap: The Snap archive for all supported Linux distributions (also available in Snapcraft store),
• logisim-evolution-<version>-aarch64.msi: Installer package for Microsoft Windows for Arm processors,
• logisim-evolution-<version>-amd64.msi: Installer package for Microsoft Windows for Intel processors,
• logisim-evolution-<version>-aarch64.dmg: macOS package for Apple processors,
• logisim-evolution-<version>-x86_64.dmg: macOS package for Intel processors (also runs on Apple processors in simulation).

The Java JAR logisim-evolution-<version>-all.jar is also available and can be run on any system with a supported Java runtime installed.

Which download should I pick?

Note for macOS users: The Logisim-evolution.app is not signed with an Apple approved certificate.

When launching the application for the first time, you will have to start it via the "Open" entry in the application icon's context menu in the macOS Finder. This is either done by clicking the application icon with the right mouse button or holding down CTRL while clicking the icon with the left mouse button. This will open a panel asking you to verify that you wish to launch the application. On more recent versions of macOS, the panel will only give you a choice of moving the app to the trash or Cancel. On those systems, click Cancel, open System Preferences, and select Security & Privacy. There you may need to click the lock to make changes and authenticate with an administrative acccount. It should show an option to open the app. See Safely open apps on your Mac for more information.

Depending on your security settings, you may also get a panel asking if you wish to allow it to accept network connections. You can click "Deny" as we do not need network access currently nor we do request any.

Logisim-evolution is available from a bunch of package managers. Note that these (except for Snap) are not maintained by the core developers. If you should observe a bug in Logisim-evolution while using one of these packages, first make sure that it can be reproduced with the most recent official packages provided through this repository and ideally the HEAD of our main branch before creating an issue on the official Logisim-evolution repository. Otherwise, report the issue to the package maintainer!

Package manager	Command	Available version
Snap	snap install logisim-evolution
Flathub	flatpak install flathub com.github.reds.LogisimEvolution
Homebrew	brew install --cask logisim-evolution
MacPorts	port install logisim-evolution
Chocolatey	choco install logisim-evolution
winget	winget install -e --id logisim-evolution.logisim-evolution
Arch User Repository
nixpkgs	nix-shell -p logisim-evolution

We also offer builds based on the current state of the main branch. If the main branch has been changed, a new Nightly build is created at midnight UTC.

Note that these builds may be unstable since the main branch is a work in progress.

To get nightly downloads, please go to the nightly workflow page and browse to the last successful build from the Nightly worker. Nightly runs each night, but terminates quickly and does not produce new packages if nothing has changed since the last run. Find the most recent run that contains the packages. The time Nightly took to run, given near the clock icon on the right, helps your search. Note that due to GitHub internals, all files are provided as ZIP archives. You must unzip the downloaded file to get the installation package.

Please share your experience in Discussions or open a ticket if you found a bug or have suggestions for improvement.

• Logisim-evolution is copyrighted ©2001-2026 by Logisim-evolution developers.
• This is free software licensed under GNU General Public License v3.