Best JD-GUI Alternatives & Competitors in 2026

Boomerang Decompiler

An open source machine code decompiler that converts binary executables into readable C source code across multiple architectures and file formats.

Nightwing DejaVM

Whole-system emulation environment for software dev, debugging, testing & security

Zenyard RE Agent

AI agent for in-depth binary analysis and reverse engineering assistance.

PinCTF

PinCTF is a Python wrapper tool that uses Intel's Pin framework to instrument binaries and count instructions for reverse engineering analysis.

Fridump

Fridump is an open source memory dumping tool that uses the Frida framework to extract accessible memory addresses from iOS, Android, and Windows applications for security testing and analysis.

Krakatau

A Java bytecode assembler and disassembler toolkit that converts classfiles to human-readable format and provides decompilation capabilities for reverse engineering Java applications.

angr

angr is a Python-based binary analysis framework that provides disassembly, symbolic execution, and program analysis capabilities for cross-platform binary examination.

Frida

Dynamic instrumentation toolkit for developers, reverse-engineers, and security researchers.

steg86

steg86 is a steganographic tool that hides information within x86 and AMD64 binary executables without affecting their performance or file size.

Attify Offensive IoT Exploitation

Private training course for IoT device pentesting and exploitation

Black Hills Information Security DNS Triage

DNS reconnaissance tool checking DNS records, subdomains, and third-party svcs

Red Balloon Security RASPUTIN

Automated hardware reversing platform using robotics for embedded device analysis

REDLattice

AI-assisted vulnerability research and advanced offensive cyber tooling firm.

Two Six Technologies

R&D firm providing cyber defense & operational tech for DoD and DHS.

CAI (Cybersecurity AI)

An open-source framework that enables building and deploying AI security tools

Havoc Framework

Open-source C2 framework for red team ops and adversary simulation.

Shellcode2PE

A Python script that converts shellcode into a PE32 or PE32+ file.

Charlotte

Charlotte is an undetected C++ shellcode launcher for executing shellcode with stealth.

Darkarmour

Darkarmour is an open-source Windows antivirus evasion framework that enables security professionals to bypass antivirus detection through customizable obfuscation and anti-analysis techniques.

InvisibilityCloak

InvisibilityCloak is a proof-of-concept C# code obfuscation toolkit designed for red teaming and penetration testing to conceal post-exploitation tools from detection.

Modlishka

Modlishka is a reverse proxy tool for intercepting and manipulating HTTP traffic, ideal for penetration testers, security researchers, and developers to analyze and test web applications.

PwnAuth

PwnAuth is an open-source tool for generating and managing authentication tokens across multiple protocols, designed for penetration testing and red team exercises.

RedGuard

RedGuard is a C2 front flow control tool that helps evade detection by security systems through traffic filtering and redirection capabilities.

SharpC2

SharpC2 is a C#-based Command and Control framework that provides remote access capabilities for penetration testing and red team operations.

stegify

A command line steganography tool that uses LSB technique to hide files within images without visible alteration.

smali/baksmali

Assembler/disassembler for the dex format used by Dalvik, Android's Java VM implementation.

delete-self-poc

A demonstration of a method to delete a locked executable or currently running file from disk.

PLCinject

PLCinject is a tool for injecting and patching blocks on PLCs with a call instruction.

JavaScript Beautifier

Reformat and re-indent bookmarklets, ugly JavaScript, and unpack scripts with options available via UI.

Luyten

Java decompiler GUI tool for Procyon under Apache License.

Fernflower

Fernflower is an analytical decompiler for Java with command-line options and support for external classes.

SchemDBG

A backend agnostic debugger frontend for debugging binaries without source code access.

GEF (pronounced ʤɛf - 'Jeff')

A set of commands for exploit developers and reverse-engineers to enhance GDB functionality.

Dwarf Debugger

A debugger tool for reverse engineers, crackers, and security analysts, with a user-friendly debugging UI and custom agent support.

ILSpy

ILSpy is the open-source .NET assembly browser and decompiler with various decompiler frontends and features.

Red Teaming Toolkit

A comprehensive repository of open-source security tools organized by attack phases for red team operations, adversary simulation, and threat hunting purposes.

LazyKali

A tool that simplifies the installation of tools and configuration for Kali Linux

PINCE

PINCE is a front-end/reverse engineering tool for the GNU Project Debugger (GDB), focused on games, with CheatEngine-like value type support and memory searching capabilities.

3GL

3GL is a high-level programming language with a focus on ASM for 6502.

Thinkst Canarytokens Detector and Diffuser/Nullifier

A Python script that detects and removes Thinkst Canary Tokens from files using signature-based detection methods.

mach_inject

A Mac OS X code injection library that enables copying code into target processes and remotely executing it through new thread creation.

SigThief

SigThief extracts digital signatures from signed PE files and appends them to other files to create invalid signatures for testing Anti-Virus detection mechanisms.

ctf-tools

A collection of setup scripts for various security research tools with installers for tools like afl, angr, barf, and more.

CloudFox

CloudFox is an open source command line tool that helps penetration testers and offensive security professionals identify exploitable attack paths and gain situational awareness in cloud infrastructure environments.

GoatseLinux: It's Wide Open [tm] GSL

A VMware image for penetration testing purposes

xocopy

Copy executables with execute, but no read permission on Unix systems.

UPX

UPX is a high-performance executable packer for various executable formats.

Java Decompiler Online

Online Java decompiler tool with support for modern Java features.