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.

  • Custom VMs From 1 to 96 vCPUs With 99.95% Uptime Icon
    Custom VMs From 1 to 96 vCPUs With 99.95% Uptime

    General-purpose, compute-optimized, or GPU/TPU-accelerated. Built to your exact specs.

    Live migration and automatic failover keep workloads online through maintenance. One free e2-micro VM every month.
    Try Free
  • Cut Data Warehouse Costs by 54% Icon
    Cut Data Warehouse Costs by 54%

    Easily migrate from Snowflake, Redshift, or Databricks with free tools.

    BigQuery delivers 54% lower TCO with exabyte scale and flexible pricing. Free migration tools handle the SQL translation automatically.
    Try Free
  • 1
    Utilities for diagnosing problems with JDBC connections
    Downloads: 0 This Week
    Last Update:
    See Project
  • 2
    Allows JDBC resources to be monitored. You can see when java.sql objects are being opened and closed and can see the line of code where a resource that is still open was originally opened.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 3
    JDLabStudio is a graphical front-end for the Java Debugging Lab Agent (JDLabAgent). JDLabStudio scans java packages, displays class files and generates JDLabAgent config files. JDLabAgent-traces are used for reconstructing control and data flows.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 4
    JDumpViewer is a graphical tool used to analyze Java thread dumps
    Downloads: 0 This Week
    Last Update:
    See Project
  • Build Agents and Models on One Platform Icon
    Build Agents and Models on One Platform

    Everything you need to build production-ready agents and models. Access 200+ Google and third-party AI models and tools.

    Gemini Enterprise Agent Platform is Google Cloud's comprehensive platform for developers to build, scale, govern, and optimize agents and models. Choose from Google's most advanced models and third-party models like Anthropic's Claude Model Family.
    Try It Free
  • 5
    An Open Source Java Emulation platform for emulating micro computers
    Downloads: 0 This Week
    Last Update:
    See Project
  • 6
    JHeap provides the toolset to help Java developers discover and fix the root cause of memory issues in their applications. JHeap integrates easily with your application server and has been designed to be used in production environments with low overhead.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 7
    JLinkCheck is an Ant Task written in Java for checking links in websites. It is not just checking one single page, but crawling a whole site like a spider, generating a report in XML and (X)HTML. JReptator will be its succesor with many more features
    Downloads: 0 This Week
    Last Update:
    See Project
  • 8
    JLogger is written for the java developper that need a powerfull and easy-to-use logging tool.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 9
    JPeek is a graphical tool and library for reflection-based runtime inspection of the object graph in Java.
    Downloads: 0 This Week
    Last Update:
    See Project
  • $300 Free Credits to Build on Google Cloud Icon
    $300 Free Credits to Build on Google Cloud

    New to Google Cloud? Get $300 in credits to explore Compute Engine, BigQuery, Cloud Run, Gemini Enterprise Agent Platform, and more.

    Start your next project with $300 in free Google Cloud credit. Spin up VMs, run containers, query petabytes in BigQuery, or build agents with Gemini Enterprise Agent Platform. Once your credits are used, keep building with 20+ always-free tier products including Compute Engine, Cloud Storage, GKE, and Cloud Run functions. No commitment required—just sign up and start building.
    Claim $300 Free
  • 10
    JRemoteRun allow execute snippets of java code in running JVM.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 11
    Java AS400 RPG source code editor, debugger, IDE.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 12

    JSSLTrace - a SSL/TLS Interceptor

    A java-based interceptor for SSL/TLS protocol

    Jssltrace is a java-based tool, which enables it's user to intercept ssl based communication between two programs. Jssltrace works essentiallly in the same manner as tcptrace (http://www.pocketsoap.com/tcptrace), which is the main inspiration for it.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 13
    This is a dynamic slicing tool for Java programs. The tool modifies the Kaffe virtual machine to collect the execution trace, and compress the trace on-the-fly. Please proceed to the tool's website http://jslice.sourceforge.net/ for download.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 14
    JSnapshot
    JSnapshot is an advanced java exception logging, monitoring and analysis tool. It traces thrown exceptions in real-time and logs a snapshot of call stack, variables and objects for every thrown exception. Fully integrated with Eclipse IDE.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 15
    The JSwat project has moved to Google Code: http://code.google.com/p/jswat/ -- the contents of the SourceForge project are no longer being updated. Please visit the new site. Thank you.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 16
    JTail is a simply multiplatform application, which show text files content especially LOG FILES. This application is a thread, which non-stop reads the file content and print what lines was added to the end file.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 17
    A facility to keep a history of context information during runtime and then dumping it in a separate file when a problem occurs (similar to core dump).
    Downloads: 0 This Week
    Last Update:
    See Project
  • 18
    Downloads: 0 This Week
    Last Update:
    See Project
  • 19
    Jabberwocky is a development environment for Lisp programs. It includes a Lisp aware editor, a source level debugger and a way to interact with Lisp processes.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 20
    Aligns java-files, which are decompiled by jad
    Downloads: 0 This Week
    Last Update:
    See Project
  • 21
    JakeWharton Hugo

    JakeWharton Hugo

    Annotation-triggered method call logging for your debug builds

    Hugo is a small Android library (and annotation processor plugin) that automatically logs method calls, parameters, return values, and execution time for methods annotated with @DebugLog. Instead of manually adding logging statements everywhere, you simply annotate a method and Hugo injects the logging at compile-time in debug builds, keeping release builds clean. This helps developers gain visibility into method flows, execution timing, and parameter passing without cluttering production code. The annotation doesn’t remain in the compiled class for non-debug builds, so there’s zero runtime penalty in release. Hugo uses bytecode/annotation processing behind the scenes but maintains simple API usage for developers. It’s especially useful during development and debugging phases in large Android codebases where tracing logic by hand would be tedious.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 22
    Utilises the JVMDI (Java Debug API) to produce line coverage reports detailing which lines of code have been executed during a test. Report is produced in XML and may be post-processed via XSLT into a prettier one.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 23
    This is going to be a Java Swing Application that will be used as a quick reference for Java API names. It will feature incremental search and filtering so that searching efficiency is improved. It will be very simple and a good way to statistically analyze java api's.
    Downloads: 0 This Week
    Last Update:
    See Project
  • 24
    Java tool for searching classpath for resources such as class or files. Drag and drop interface for add new jars to your search path. Useful for resolving those class not found problem such as java.lang.ClassNotFoundException and java.lang.NoClassDefFoun
    Downloads: 0 This Week
    Last Update:
    See Project
  • 25
    JAVA Program to Sequence Diagram Generator. This tool tries to help on analysing and understanding the behavior of the code when developping JAVA applications by generating the respective Sequence Diagram automatically at program execution.
    Downloads: 0 This Week
    Last Update:
    See Project
Auth0 Logo