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RingoJS is a JavaScript platform built on the JVM and optimized for server-side applications.


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Ringo is a JavaScript platform built on the JVM and optimized for server-side applications. It's based on the Mozilla Rhino JavaScript engine.

It adds a number of features to Rhino that make it suitable for real-world, large-scale application development:

  • A fast, auto-reloading, and CommonJS-compliant module loader.
  • A rich set of modules covering I/O, logging, development tools and much more.
  • Support for blocking and non-blocking I/O.
  • Scalable HTTP server based on the Jetty project.
  • Support for CommonJS packages to install or write additional software components.

For more information, visit the RingoJS web site:

Download and Installation

Download the latest precompiled release from the download page. Extract the archive and add the ringojs/bin directory to your local PATH for convinience.

If you use the Homebrew package manager on MacOS, you can use the ringojs formula: brew install ringojs

Take a look at the Getting Started Guide on Ringo's website for more details how to get started after you installed Ringo on your system.

Verify releases

To verify the integrity of a downloaded binary distribution, use the associated checksum file:

$ grep ringojs-x.y.z.tar.gz SHASUMS256-x.y.z.txt | sha256sum -c -

Verifying the integrity of provided checksums

Releases of RingoJS will be signed with one of the following GPG keys:

All official releases will be signed by at least one published key. Get the latest release key for 3.0.0 and newer with:

$ gpg --keyserver hkps:// --recv-keys 14059F1764856429089FB4236167CFBBBDF2A508

Download the checksums SHASUMS256.txt and separate signature SHASUMS256.txt.sig for the release, e.g.

$ curl -LO
$ curl -LO

Now verify the checksums with:

$ gpg --verify SHASUMS256-4.0.0.txt.sig
gpg: assuming signed data in 'SHASUMS256-4.0.0.txt'
gpg: Signature made Wed Feb 23 12:07:10 2022 CET
gpg:                using RSA key 14059F1764856429089FB4236167CFBBBDF2A508
gpg: Good signature from "Philipp Naderer-Puiu <>" [ultimate]

Building from Source


Ringo runs on top of the Java Platform. You can use an open implementation like Eclipse Temurin or Oracle's distribution. It uses Gradle as build tool.

If you have these installed, building Ringo is straightforward:

Check out Ringo using Git:

git clone git://

Change to the ringojs directory and run




JetBrains sponsored an Open Source license for IntelliJ IDEA to create and maintain Ringo. Thanks for your continuous support!

A huge salute to for supporting this projects over the years!