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JD-GUI

JD-GUI is a free graphical tool for viewing reconstructed Java source from compiled CLASS files.

Place
#18 of 24
Score
6.0
JD-GUI's website

What JD-GUI is

JD-GUI is a free graphical tool for viewing reconstructed Java source from compiled CLASS files. Its color-coded display lets you browse methods and fields, inspect CLASS files, and navigate Java module hierarchies. It also handles JAR, WAR, EAR, AAR, KAR, JMOD, and ZIP files. For stack-trace investigation, you can drop in a LOG file; JD-GUI decompiles the referenced CLASS files and displays the code line associated with the trace. The project describes its tools as intended for decompiling and analyzing Java 5 bytecode and later. JD-GUI is written in Java, released under the GPLv3 License, and supports bytecode decompilation rather than native-code decompilation. It is available for Linux, macOS, and Windows, with releases listed as a JAR, RPM, DEB, macOS TAR, or Windows ZIP. The related JD-Eclipse plug-in displays Java sources during debugging in Eclipse.

Good

  • Color-coded reconstructed Java source
  • Supports CLASS files and several archive formats
  • Displays source lines associated with Java stack traces
  • Free and released under GPLv3

Watch out

  • Does not decompile native code
  • JD-Eclipse plug-in is not signed

Who it suits

JD-GUI suits Java developers who need to inspect compiled code, explore classes, or investigate stack traces. It is available across Linux, macOS, and Windows.

Verdict

JD-GUI focuses on browsing reconstructed Java source and tracing errors back to code. Its bytecode-only scope and unsigned related Eclipse plug-in are worth noting.

Plans and prices

From JD-GUI's own pricing page, checked 7 Oct 2026.

All about pricing
PlanPriceWhat it gives you
JD-GUIFreeStandalone graphical utility · GPLv3

The facts

Each one read from JD-GUI's own pages, with the date it was checked.

What it does

Downloads
The site lists JD-GUI releases as a JAR, RPM, DEB, macOS TAR, and Windows ZIP.checked 7 Oct 2026
Integrations
The related JD-Eclipse product is an Eclipse plug-in for displaying Java sources during debugging.checked 7 Oct 2026
Intended use
The site describes the Java Decompiler project as tools for decompiling and analyzing Java 5 bytecode and later versions.checked 7 Oct 2026
Language
JD-GUI is written in Java.checked 7 Oct 2026
License
JD-GUI is an open-source project released under the GPLv3 License.checked 7 Oct 2026
Navigation
Users can browse CLASS files and Java module hierarchies.checked 7 Oct 2026
Purpose
JD-GUI displays reconstructed Java source code from .class files and lets users browse methods and fields.checked 7 Oct 2026
Security
The site says the JD-Eclipse plug-in is not signed and instructs users to choose “Install anyway” during installation.checked 7 Oct 2026
Source display
JD-GUI displays color-coded Java source code.checked 7 Oct 2026
Stack traces
JD-GUI can accept dropped LOG files, decompile CLASS files, and display the line of code that appears in Java stack traces.checked 7 Oct 2026
Support
The site links to GitHub issues for JD-GUI.checked 7 Oct 2026
Supported files
JD-GUI supports CLASS, JAR, WAR, EAR, AAR, KAR, JMOD, and ZIP files.checked 7 Oct 2026

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