If you already have IntelliJ IDEA installed, you already own the JAR. It is tucked away in the application's plugin directory.
There is no single "official" download button for a pre-compiled fernflower.jar on the main JetBrains Fernflower GitHub . Instead, you have three primary ways to obtain it: 1. Extract from IntelliJ IDEA (Easiest)
To get the absolute latest version with all recent bug fixes, you can build it yourself using Gradle: fernflower download jar
JetBrains/fernflower: Decompiler from Java bytecode ... - GitHub
The is an industry-standard tool used to convert compiled Java bytecode back into readable source code. While it is most famous for being the engine behind the IntelliJ IDEA Bytecode Decompiler , it is also available as a standalone command-line tool. How to Get the Fernflower JAR If you already have IntelliJ IDEA installed, you
You can find stable, pre-built versions of Fernflower on Maven Central or JarCasting . These are often provided by the Red Hat Windup project, which maintains a reliable fork. 3. Build from Source
: Look in /plugins/java-decompiler/lib/
: Check Applications/IntelliJ IDEA.app/Contents/plugins/java-decompiler/lib/ File Name : It is typically named java-decompiler.jar . 2. Download from Maven Repositories