Browse free open source Java Debuggers and projects below. Use the toggles on the left to filter open source Java Debuggers by OS, license, language, programming language, and project status.

  • Stay in Flow. Let Zenflow Handle the Heavy Lifting. Icon
    Stay in Flow. Let Zenflow Handle the Heavy Lifting.

    Your AI engineering control center. Zenflow turns specs into shipped features using parallel agents and multi-repo intelligence.

    Zenflow is your engineering control center, turning specs into shipped features. Parallel agents handle coding, testing, and refactoring with real repo context. Multi-agent workflows remove bottlenecks and automate routine work so developers stay focused and in flow.
    Try free now
  • Gen AI apps are built with MongoDB Atlas Icon
    Gen AI apps are built with MongoDB Atlas

    The database for AI-powered applications.

    MongoDB Atlas is the developer-friendly database used to build, scale, and run gen AI and LLM-powered apps—without needing a separate vector database. Atlas offers built-in vector search, global availability across 115+ regions, and flexible document modeling. Start building AI apps faster, all in one place.
    Start Free
  • 1

    MinGW - Minimalist GNU for Windows

    A native Windows port of the GNU Compiler Collection (GCC)

    MinGW: A native Windows port of the GNU Compiler Collection (GCC), with freely distributable import libraries and header files for building native Windows applications; includes extensions to the MSVC runtime to support C99 functionality. All of MinGW's software will execute on the 64bit Windows platforms.
    Leader badge
    Downloads: 2,945,359 This Week
    Last Update:
    See Project
  • 2
    Bytecode Viewer

    Bytecode Viewer

    A reverse engineering suite (decompiler, editor, debugger and more)

    Some of Bytecode Viewer features are that it provides Java Decompiling with Six different decompilers (DJ-GUI/Core, Procyon, CFR, Fernflower, Krakatau, and JADX-Core). Bytecode Decompiling with CFIDE. Android APK integrated with Dex2Jar. Securely launch Java applications and insert hooks via EZ-Injection. Scan for malicious code with the Malicious Code Scanner plugin. Export as DEX, Jar, Class, Zip or Java Source File. Open Android APKs, Android DEX, Java Class Files and Java Jars. (WAR & JSP Support!). Extensively configurable, over 100+ settings! Works seamlessly with all Operating Systems. Integrates BCV into Windows by installing it, it'll associate all .class, .dex and .apk to open with BCV. You can view Jar & APK Resources with ease by APKTool.jar integration. It is 100% free and open sourced under GPL v3 CopyLeft.
    Downloads: 37 This Week
    Last Update:
    See Project
  • 3
    WinXP, Vista, Win7, linux, OpenSolaris native port of the BSD PSPSDK (ps2dev.org), with freely distributable import libraries and header files (DevPaks) for building cross compiled homebrew Sony PSP (PlayStation Portable) applications.
    Downloads: 45 This Week
    Last Update:
    See Project
  • 4
    (Diver is in the process of being moved to GitHub. Please find us at https://github.com/thechiselgroup/Diver. Support requests & messages sent here may never be seen.) Dynamic Interactive Views For Reverse Engineering. Div/er is a set of Eclipse Plugins that aid developers in understanding software. It uses dynamic analysis and reverse engineering to offer views and filters that aid comprehension and discovery.
    Downloads: 34 This Week
    Last Update:
    See Project
  • Auth0 for AI Agents now in GA Icon
    Auth0 for AI Agents now in GA

    Ready to implement AI with confidence (without sacrificing security)?

    Connect your AI agents to apps and data more securely, give users control over the actions AI agents can perform and the data they can access, and enable human confirmation for critical agent actions.
    Start building today
  • 5
    Eclipse Portable [4.6–4.26]

    Eclipse Portable [4.6–4.26]

    Portable version of the multifunctional development platform Eclipse.

    With this portable version of Eclipse, you can develop software directly from your removable mass storage device, even without admin rights. To get started, please visit the Eclipse Portable wiki: https://sourceforge.net/p/eclipse-neon-portable/wiki GitHub: https://github.com/Berny23/eclipse-portable Thank you for over 180,000 Downloads! Please note: A few months ago, I completely switched to Linux (now Arch btw). So, I'll be no longer active creating portable apps for Windows.
    Downloads: 45 This Week
    Last Update:
    See Project
  • 6
    Robust

    Robust

    Android HotFix solution with high compatibility and high stability

    Robust is an Android HotFix solution with high compatibility and high stability. Robust can fix bugs immediately without a reboot. Robust is an Android HotFix solution with high compatibility and high stability. Robust can fix bugs immediately without publishing apk. Support fixing at method level,including static methods. Support add classes and methods. Support ProGuard,including inline methods or changing methods' signature. AutoPatch will generate patch for Robust automatically. You should modify inner classes' private constructors to public modifier. Classes added in patch should be static nested classes or non-inner classes,and all fields and methods in added class should be public.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 7
    Stetho

    Stetho

    Debug bridge for Android applications

    Stetho is a sophisticated debug bridge for Android applications. When enabled, developers have access to the Chrome Developer Tools feature natively part of the Chrome desktop browser. Developers can also choose to enable the optional dumpapp tool which offers a powerful command-line interface to application internals. Alternatively you can include Stetho from Maven Central via Gradle or Maven. Only the main stetho dependency is strictly required, however you may also wish to use one of the network helpers. The integration with the Chrome DevTools frontend is implemented using a client/server protocol which the Stetho software provides for your application. Once your application is integrated, simply navigate to chrome://inspect and click “Inspect” to get started! Network inspection is possible with the full spectrum of Chrome Developer Tools features, including image preview, JSON response helpers, and even exporting traces to the HAR format.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 8
    Java Console is a Java Command promt tool intended for Software Developers, System Administrators and as a plug in to other applications. It is a very powerful console client just run it and have fun
    Leader badge
    Downloads: 21 This Week
    Last Update:
    See Project
  • 9
    Debugger for Bash version 3(Bourne again shell). Plugin for Eclipse. Will only work with shell script editor ShellEd.
    Downloads: 3 This Week
    Last Update:
    See Project
  • Identity Matrix AI - #1 in B2B Lead Generation Icon
    Identity Matrix AI - #1 in B2B Lead Generation

    For B2B sales and marketing teams seeking a tool to identify and engage high-intent website visitors

    Identity Matrix transforms anonymous website traffic into detailed visitor profiles with impressive accuracy, offering valuable insights for businesses to enhance marketing and sales strategies. For companies serious about capitalizing on every website visitor, this platform is second to none.
    Learn More
  • 10
    The m6800 Simulator is a teaching tool to introduce students to microprocessors. It is based on a cut-down version of the M6800 chip, and a reduced instruction set. The simulator assembles and simulates execution of the users code on a GUI
    Leader badge
    Downloads: 10 This Week
    Last Update:
    See Project
  • 11
    BT-Sim is a BlueTooth simulator on a HCI level. The project alows to develop and test BT applications without using real BT hardware. It works in particular with PalmSource's Palm OS Simulator.
    Leader badge
    Downloads: 9 This Week
    Last Update:
    See Project
  • 12

    Jlint

    Static analyzer for Java bytecode

    Jlint will check your Java code and find bugs, inconsistencies and synchronization problems by doing data flow analysis on the code and building the lock graph. Jlint is fast, easy to learn, and requires no changes in the class files to be checked.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 13
    Introspect on running programme, view and alter object fields and methods. Edit the code of any method at runtime; apply the changes to any combination of objects, such as an array, or a complete class. Complete rewrite underway available Jan 2007.
    Downloads: 6 This Week
    Last Update:
    See Project
  • 14
    httptrace - TCP/HTTP trace utility (for Java or Win32/jview.exe) Listens on a TCP/IP port, redirects data to another port and writes traces. Several options (search for patterns, ...).
    Downloads: 6 This Week
    Last Update:
    See Project
  • 15
    Jar Browser is a Java development utility for searching and browsing the contents of a set of jar and zip files. It supports searching for classes across multiple jars, plus a variety of other features. Great for solving CLASSPATH issues.
    Leader badge
    Downloads: 3 This Week
    Last Update:
    See Project
  • 16
    The Tool Box

    The Tool Box

    Tools for the payments type!

    Version 1.1.5 - Added: Added the ability to edit the EMV panel - You can change which tags show, and what order they are in - Added: Tag 9F10 (Issuer Application Data) to which also includes CVR (a subtag of 9F10) - Added: Menu link to the homepage (sourceforge) - Fixed: 9F07/AUC had the wrong tag details - Fixed: File>Close now saves notes and config updates before exiting - Fixed: Tag 95/TVR title had a spelling mistake - Fixed: Homepage wasn't populating EMV page names - Fixed: EMV menu would prompt to update even if there was nothing changed - Changed: Removed unused classes, old stuff that isn't used - Changed: Reverted home page image - Changed: Removed some test prints and refactored EMV classes - Changed: No longer prompts to restart after EMV menu change, just changes it - Changed: EMV Navigation Panel button generation (for the dynamic buttons) thetoolbox2013@gmail.com
    Downloads: 3 This Week
    Last Update:
    See Project
  • 17
    NetTool is a developer tool for monitoring and manipulating application-level network messages, particularly useful for debugging web applications and web services. There are two components to NetTool: the HTTP Client, and the TCP Tunnel.
    Downloads: 5 This Week
    Last Update:
    See Project
  • 18
    We extend the Eclipse IDE with tools for development in Haskell, a functional programming language, providing support for a wide range of tools (compilers, interpreters, doc tools etc.) in a coherent, convenient and configurable environment.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 19
    GNUDE is a complete suite of GNU C, C++, Fortran, and Java Cross Compilers, and the GDB CPU Simulator and Debugger for embedded microprocessor applications development. Targets development for ARM7, ARM9, and XScale applications.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 20
    HL7 Inspector

    HL7 Inspector

    HL7 Inspector is a tool for managing HL7 messages

    The HL7 Inspector project has moved to Bitbucket. https://bitbucket.org/crambow/hl7inspector All new releases can be found there. The web-based version can still be found at www.hl7inspector.com
    Downloads: 1 This Week
    Last Update:
    See Project
  • 21
    JDBC-XML Driver for Mysql 4.0. Allow efficient definition ,storage and retrieval of answers to forms. This JDBC-XML driver is an extension to the mysql JDBC Driver adding XML capabilities.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 22
    A java class assambler. This program assembles java byte code instructions for the JVM, like MASM for the CPU. Knowledge of the java byte code instruction is strongly required.
    Downloads: 3 This Week
    Last Update:
    See Project
  • 23
    LOG4PLSQL is a PLSQL framework for logging in all PLSQL code this project was born from the log4J spirit (and use it). You have the possibility to log apart from transaction and use all LOG4J feature.
    Downloads: 1 This Week
    Last Update:
    See Project
  • 24
    Java IDE, project support, build, debugger, grep.
    Downloads: 2 This Week
    Last Update:
    See Project
  • 25

    StackTraceSealer

    Aid in finding infinite loops in Java programs on production systems

    StackTraceSealer is a JConsole plugin with its own Java Agent Library that can be used to seal stack frames on a thread stack trace to detect whether these frames have changed or they have remained the same all the time to aid in finding an infinite loop on a production system when all you have is a long seemingly constant stack trace in the thread dump.
    Downloads: 2 This Week
    Last Update:
    See Project
  • Previous
  • You're on page 1
  • 2
  • 3
  • 4
  • 5
  • Next