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Jato VM

The open source JVM implementation that aims to support JVM specification Java SE 7 Edition

Download Jato The latest release is v0.3 | Source: github,
release notes (04-01-2012)

What is Jato ?

Jato is an open source implementation of the JVM that aims to support the JVM specification Java SE 7 Edition. It is not complete but you can run some Java applications with it on 32-bit and 64-bit x86 Linux machines. Jato uses Boehm GC as its garbage collector and GNU Classpath to provide essential Java run-time libraries.

How can I try it out?

Use the following command to clone the git repository:

  git clone git://

and then check out the README file for details how to compile and install Jato on your machine.

  • Aims to supports the Java virtual machine specification Java SE 7 Edition
  • Supports modern 32-bit and 64-bit x86 CPUs on GNU/Linux
  • Uses GNU Classpath for essential Java libraries
  • Licensed under the 2-clause BSD license

Need more information?

Check out the documentation!

Get Help by


If you are curious about something, feel free to ask questions on the IRC channel - #jato on freenode (archives).


Please feel free to contact us us on the mailing list for questions, bug reports, and patches.