How C++ engineers build web applications

Cheerp is an enterprise-grade compiler toolchain that can compile C/C++ into efficient WebAssembly and JavaScript. It is open source, liberally licensed, and actively developed by Leaning Technologies.

Java Virtual Machine for modern web browsers

Run Java 8, 11 and 17 applications, libraries, applets, Java Web Start, and Oracle Forms on the web without legacy plugins.

Virtual machines in your web app

CheerpX is a JavaScript library that enables secure client-side execution of x86 binaries on any browser. Coming soon.

Run Flash content without the Adobe Flash plugin

An HTML5 Flash emulator that allows your Flash content to run seamlessly on browsers, after the end of life of the Flash player.

Run Code Sandboxes in your browser

Instant, in-browser runtime for Node.js, Python, and Ruby on Rails to power the future of Web-based developer experiences.

Run Java Web Start applications in the browser

CheerpJ JNLP Runner

Run Java Web Start Applications without a Java Desktop installation.

Run Java Applets in the modern browser

CheerpJ Applet Runner

Run Java Applets in modern browsers without plugins