Cleanflower

Cleanflower is a modern general purpose Java & JVM language decompiler focused on providing the best quality, speed, and usability. It is a CleanroomMC maintained fork of Vineflower.

Cleanflower's features include:

• Java 21+ support, including records, sealed classes, switch expressions, pattern matching, and more
• Clean code generation and output, with automatic output formatting
• Multithreaded decompilation

Examples of Vineflower/Cleanflower output compared to other decompilers can be found on the Vineflower website.

Use

Cleanflower can be used from the console or as a library. To run Cleanflower from the command line, download the latest release from the Releases tab. You can then run Cleanflower with java -jar cleanflower.jar <arguments> <source> <destination>. <arguments> is the list of commandline arguments that you want to pass to the decompiler. <source> can be a jar, zip, folder, or class file, and <destination> can be a folder, zip, jar, or omitted to print to the console.

To use Cleanflower as a library, you can find distributions on Cleanroom Maven. Cleanflower requires Java 17 or higher to run. Cleanflower can be added as a dependency in gradle with:

repositories {
    maven {
        url 'https://repo.cleanroommc.com/releases'
    }
}

dependencies {
    implementation 'com.cleanroommc:cleanflower:<version>'
}

More instructions on how to interface with the decompiler API can be found on the Vineflower website.

Please report any issues to the Issues tab!

Building

Cleanflower can be built simply with ./gradlew build.

Contributing

Contributions are always welcome! When submitting pull requests, please target the latest development branch. Upstream Vineflower development docs are available on the Vineflower website.

Special Thanks

Cleanflower is a fork of Vineflower, which itself is a fork of Jetbrains' Fernflower, MinecraftForge's ForgeFlower, FabricMC's fork of Fernflower. Special thanks to:

• Stiver, for creating Fernflower
• JetBrains, for maintaining Fernflower
• MinecraftForge Team, for maintaining ForgeFlower
• FabricMC Team, for maintaining Fabric's fork of Fernflower
• CFR, for its large suite of very useful tests