Kojo is open source software, and is freely available. You can download and install Kojo based on the information provided on this page. Alternatively, you can Run Kojo Online.

Kojo downloads: Linux/Unix | Windows | Mac

If you run into problems while installing Kojo, visit the troubleshooting page.

New Kojo Releases are announced on the Kojo Blog; you can subscribe to the blog feed to be notified.

Linux/Unix

Kojo Installer (jar) (Version: 2.4.03)
  • Download the Kojo Installer (jar), open up a terminal, go to the directory where the installer is located, and run the command:  java -jar kojoInstall-2.4.03.jar
  • If Java is not available on your computer, get it from the Java download page and install it. Then run the Kojo installer.
  • After Kojo is installed, you can run it from the Desktop (if you installed Desktop shortcuts). You can also run it by going (in a terminal) into the bin sub-directory under the Kojo install directory, and running:  ./kojo
Unix release notes

Windows

Kojo Installer (exe) (Version: 2.4.03)
  • Download the Kojo Installer (make sure it is saved as a .exe file by your browser). Run it to install Kojo.
  • Kojo requires Java. If Java is not available on your computer, the installer will redirect you to the Java download page; get Java from there and install it. Then run the Kojo installer.
  • After Kojo is installed, you can run it from the Windows Start Menu, via the Kojo v2 Program Group. You can also run it from the Desktop (if you installed Desktop shortcuts).
Windows release notes

Mac

Kojo Installer (dmg) (Version: 2.4.03)
  • Download the Kojo Installer (dmg) and open the dmg file. If the OS complains about a damaged dmg, follow these instructions to fix the issue.
  • Copy the Kojo app to your Applications folder. Double-click on the app to run Kojo (you might see some warnings when running the app). You can drag the app to your Dock for easy running in the future.
  • Kojo requires Java. If Java is not available on your computer, you will be prompted to install Java the first time you run Kojo.
  • The Kojo app uses Apple Java 1.6. If you want to use Oracle Java 1.7+, and are not averse to manual installation, you can use the Unix Kojo Installer.
Mac release notes

Media Files

Media files are useful for working with the multiple turtle/sprite support in Kojo. Many different backgrounds, costumes, and sound files are available in the Scratch Media Bundle. To use these files, download the media bundle zipfile and unzip it under your home directory. You can then access the media files from inside Kojo using their absolute path, or their path relative to your home directory. For more information, visit the Media Notes page.