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Virtual Machine for the Web
Cheerp - a C/C++ compiler for Web applications - compiles to WebAssembly and JavaScript
Real Java in the browser, built from OpenJDK. Issues and examples for CheerpJ: Java 8, 11, 17 and 21 apps, applets, JNLP and libraries, client-side.
C++ to JavaScript/WebAssembly compiler
A browser-native code sandbox. Run Node.js, Rust, C++, Python (preview), and other full-stack runtimes directly in the browser.
Unmodified Minecraft 1.2.5 in the browser using CheerpJ
The CheerpJ browser extension for Java applets, in Chrome and Edge. Issue tracker.