Home — JRuby.org

The Best of the JVM

High performance
Real threading
Vast array of libraries

It's Just Ruby

Ruby 3.4 compatible

Platform Independent

Easy to install
Easy migration
No hassles

↓ Download JRuby

Extract JRuby into a directory.
Add that directory's bin subdirectory to the end of your path.
Test it: jruby -v

Detailed instructions →

JRuby Wiki

JRuby Blogs

JavaDocs and RDocs

Recent News

JRuby 9.4.12.1 Released

The JRuby community is pleased to announce the release of JRuby 9.4.12.1.

Homepage: https://www.jruby.org/
Download: https://www.jruby.org/download

JRuby 9.4.12.x targets Ruby 3.1 compatibility.

Security

jruby-openssl has been updated to 0.15.4, which re-enables hostname verification by default. This addresses more...

Awards
- InfoWorld 2010 Bossie Awards: Best of Open Source Software
  
  InfoWorld's Best of Open Source Software Awards, chosen annually by Test Center editors and reviewers, recognize the best open source software for developers, IT organizations, and the business users they serve.

Recent Toots

Historical releases hosted by