JD-GUI vs Nishang: Which Browser Extension tool is Best in 2025?

JD-GUI is an open-source, standalone graphical Java decompiler, available on Kali Linux at /usr/bin/jd-gui, designed for reverse-engineering compiled Java applications by extracting readable source code from .class or .jar files. Developed by Emmanuel Dupuy and packaged for Kali by Sophie Brun, JD-GUI provides a user-friendly GUI to browse class hierarchies, view decompiled Java code, and save sources as .java files. Ideal for cybersecurity researchers, Android developers, and ethical hackers, it supports malware analysis, code auditing, and vulnerability research. Often paired with tools like Dex2Jar, JD-GUI simplifies Java bytecode analysis.

Nishang is an open-source PowerShell framework tailored for offensive security, penetration testing, and red teaming, pre-installed on Kali Linux at /usr/share/nishang. It offers a collection of scripts and payloads designed to facilitate reconnaissance, privilege escalation, backdooring, and data exfiltration in Windows environments. Developed by Samrat Ashok, Nishang leverages PowerShell’s native integration with Windows to execute attacks in memory, evading traditional antivirus detection. Its modular structure, organized into categories like Powerpreter, Backdoors, and Gather, makes it a versatile tool for ethical hackers and security researchers.