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JD-GUI, a standalone graphical utility that displays Java sources from CLASS files.


JD-GUI is a standalone graphical utility that displays Java source codes of ".class" files. You can browse the reconstructed source code with the JD-GUI for instant access to methods and fields.

How to build JD-GUI ?

> ./gradlew build 

generate "build/libs/jd-gui-x.y.z.jar"

> ./gradlew installOsxDist

generate "build/install/jd-gui-osx/JD-GUI.app"

> iexplore http://sourceforge.net/projects/launch4j/files/launch4j-3/3.7/launch4j-3.7-win32.zip/download
> unzip launch4j-3.7-win32.zip
> ./gradlew -DLAUNCH4J_HOME=.../path/to/launch4j-3.7-win32 installWindowsDist

generate "build/install/jd-gui-windows/jd-gui.exe"

> ./gradlew buildDeb

generate Ubuntu/Debian installer

> ./gradlew buildRpm

generate RedHat/CentOS/Fedora installer

How to launch JD-GUI ?

  • Double-click on "jd-gui-x.y.z.jar"
  • Double-click on "JD-GUI" application from Mac OSX
  • Double-click on "jd-gui.exe" application from Windows
  • Execute "java -jar jd-gui-x.y.z.jar" or "java -classpath jd-gui-x.y.z.jar org.jd.gui.App"

How to use JD-GUI ?

  • Open a file with menu "File > Open File..."
  • Open recent files with menu "File > Recent Files"
  • Drag and drop files from your file explorer

How to extend JD-GUI ?

> ./gradlew idea 

generate Idea Intellij project

> ./gradlew eclipse

generate Eclipse project

> java -classpath jd-gui-x.y.z.jar;myextension1.jar;myextension2.jar org.jd.gui.App

launch JD-GUI with your extensions

How to uninstall JD-GUI ?

  • Java: Delete "jd-gui-x.y.z.jar" and "jd-gui.cfg".
  • Mac OSX: Drag and drop "JD-GUI" application into the trash.
  • Windows: Delete "jd-gui.exe" and "jd-gui.cfg".

Tools Reverse Engineering