jd-gui
GUI Java .class decompiler
resource-developmentRed Team
Matches ATT&CK tactic: Resource Development ↗
Toolresource-developmentredLinuxKali LinuxPlatforms: Linux · Last verified September 6, 2026
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.
Only use this tool against systems you own or are explicitly authorized to test — see the disclaimer.
Getting started
Install on Kali Linux with `sudo apt install jd-gui`. See the official Kali tool page and upstream homepage linked above for full usage and configuration details.
