The “Java Decompiler project” aims to develop tools in order to decompile and analyze Java 5 “byte code” and the later versions.

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.

JD-Eclipse is a plug-in for the Eclipse platform. It allows you to display all the Java sources during your debugging process, even if you do not have them all.

JD-Core is a library that reconstructs Java source code from one or more “.class” files. JD-Core may be used to recover lost source code and explore the source of Java runtime libraries. New features of Java 5, such as annotations, generics or type “enum”, are supported. JD-GUI and JD-Eclipse include JD-Core library.

JD-Core, JD-GUI & JD-Eclipse are open source projects released under the GPLv3 License.

• JD-Core and JD-GUI are written in Java.
• JD-Core works with most current compilers including the following:
  • JDK 1.1.8, JDK 1.3.1, JDK 1.4.2, JDK 1.5.0, JDK 1.6.0, JDK 1.7.0, JDK 1.8.0, JDK 9.0.1, JDK 10.0.2
  • jrockit90_150_06
  • jikes-1.22
  • harmony-jdk-r533500
  • Eclipse Java Compiler v_677_R32x, 3.2.1 release
• JD-GUI supports Drag and Drop.
• JD-GUI supports CLASS, JAR, WAR, EAR, AAR, KAR, JMOD & ZIP files.
• JD-GUI displays color coded Java source code.
• JD-GUI allows you to browse the CLASS files and Java modules hierarchy.
• JD-GUI lets you drag and drop LOG files, decompile CLASS files, and display the line of code that appears in Java stack traces.

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.

JD-Eclipse is a plug-in for the Eclipse platform. It allows you to display all the Java sources during your debugging process, even if you do not have them all.