CheerpJ is a drop-in HTML5 replacement for the JVM, and is compatible with 100% of Java 8, including Swing, reflection and dynamic class loading.

Documentation
Issues
Discord server

With CheerpJ, you can:

• Run existing Java applications in the browser with no changes
• Include Java applets in webpages without legacy plugins
• Migrate Java Web Start / JNLP applications to work on modern systems
• Use Java libraries in JavaScript/TypeScript seamlessly

Licensing

CheerpJ is free for non-commerical use and technical evaluation. See licensing for details.