A Java decompiler is a tool that translates compiled bytecode ( .class files) back into readable Java source code. While the output is rarely identical to the original code, it is often close enough to understand logic, debug runtime issues, and patch binaries.
You’ll see something like this:
| Tool | Best for | Standout feature | |------|----------|------------------| | | Quick, one-off decompilation | Drag-and-drop .jar / .class , lightweight | | FernFlower | IDE integration (IntelliJ) | Handles modern Java 17+ features | | Procyon | Complex or obfuscated code | Excellent generics and enum recovery | java class decompiler