CheerpJ 5.0: Java 21/25 in the browser, full OpenJDK, and a new WasmGC engine

Leaning Technologies has released CheerpJ 5.0, introducing support for Java 21 and 25, the full OpenJDK runtime for compiling and running code in the browser, and an experimental WasmGC execution engine. The update enables running unmodified large-scale Java desktop applications and games like Minecraft entirely client-side. Commercial licensing is modeled after standard OpenJDK distributions. Open article →