debugging
Self-hosted Error Tracking.
Bugsink offers real-time error tracking for your applications with full control through self-hosting.
The Ultimate Debugging Server. Buggregator is a lightweight, standalone server that offers a range of debugging features for PHP applications.
It works seamlessly with the libraries you already use, like Ray, Symfony/VarDumper, Monolog, Sentry, etc. The goal was to simplify the integration process and provide a centralized server to manage and display all the data from your project.
🔥 Time Travel Visual Debugger for Rust. Visualize and debug Rust programs with a new lens.
Sampling CPU and HEAP profiler for Java featuring AsyncGetCallTrace + perf_events.
This project is a low overhead sampling profiler for Java that does not suffer from the Safepoint bias problem. It features HotSpot-specific API to collect stack traces and to track memory allocations. The profiler works with OpenJDK and other Java runtimes based on the HotSpot JVM.
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Local email debugging made easy.
Phost is an email debugging tool and local SMTP server, developed primarily in PHP. It leverages a powerful stack of modern technologies:
Visualize ownership and lifetimes in Rust for debugging and optimization.
RustOwl visualizes ownership movement and lifetimes of variables. When you save Rust source code, it is analyzed, and the ownership and lifetimes of variables are visualized when you hover over a variable or function call.
API Parrot is the tool specifically designed to reverse engineer the HTTP APIs of any website. Making life easier for developers looking to automate, integrate or scrape websites without public APIs.
Exploit Development and Reverse Engineering with GDB & LLDB Made Easy.
pwndbg (/paʊnˈdiˌbʌɡ/) is a GDB and LLDB plug-in that makes debugging suck less, with a focus on features needed by low-level software developers, hardware hackers, reverse-engineers and exploit developers.
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Slow down, pause, or speed up time of any web content.
Debug animations, study cool demos, and make games easier or harder.
TraceRoot is an open-source debugging platform that helps engineers fix production issues 10x faster by combining structured traces, logs, and source code context with AI-powered analysis.
A REPL for Symfony and PHP.
pSym works both inside and outside Symfony project. When used within a Symfony project, it provides additional features such as access to variables like $kernel, $container, $doctrine, and $em. Additionally, all registered project commands become accessible as well.
A minimal, developer-friendly pretty-printer and debug dumper for Go structs, inspired by Laravel’s dump() and Symfony’s VarDumper.
godump is a developer-friendly, zero-dependency debug dumper for Go. It provides pretty, colorized terminal output of your structs, slices, maps, and more — complete with cyclic reference detection and control character escaping. Inspired by Symfony's VarDumper which is used in Laravel's tools like dump() and dd().
A debugger for Linux. Partially inspired by RemedyBG.
Mom, can we have RAD Debugger on Linux? No, we have debugger at home. Debugger at home
K8s-Sherlock is your open-source investigative tool for diving deep into Kubernetes cluster mysteries. Designed to simplify and expedite debugging processes, it's the essential utility for demystifying complex container orchestration issues.
K8s-Sherlock is an open-source Kubernetes pod designed for debugging and diagnostics. As a swiss-army knife for your Kubernetes cluster, it comes pre-loaded with a host of tools to help you diagnose issues with network, containers, and more. Developed to expedite the troubleshooting process, K8s-Sherlock is your go-to pod for resolving complex orchestration issues.
Capture is a reverse proxy that takes an incoming HTTP request and sends it to another server, proxying the response back to the client, while showing them in a dashboard.
Visual Event is a Javascript bookmarklet which provides debugging information about events that have been attached to DOM elements. Visual Event shows:
Which elements have events attached to them
The type of events attached to an element
The code that will be run with the event is triggered
The source file and line number for where the attached function was defined (Webkit browsers and Opera only)
In addition to being useful for debugging your own code, Visual Event can be used as an educational tool, showing how many web-sites have been authored.
A pretty (simple) alternative to strace.
lurk is a simple and pretty alternative to strace. It allows the user to trace system calls of a process or of a command. In contrast to strace, lurk focuses on a simple, yet pretty, user experience while implementing the most important use cases of strace.
Experimental Linux strace LLM agent.
pike-agent records and analyzes how programs behave on Linux. It traces a program's activity, indexes it into a database, and lets you chat with an LLM agent about it in a TUI.
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why-did-you-render monkey patches React to notify you about potentially avoidable re-renders. (Works with React Native as well.)
jQuery-inlog allows you to easily debug your jQuery code. See exactly what you pass to functions, what they return and in which context (this-value) they were executed.
jQuery-inlog is a passive plugin, which injects (js ftw!) console.log calls inside your jQuery core. It makes debugging of selectors and chains a breeze. No more alert($obj.length) and stuff...
Modern debugger for Linux x86-64. Written in Rust for Rust programs.
Intercept & view all your HTTP(S). Mock endpoints or entire servers. Rewrite, redirect, or inject errors.
HTTP Toolkit is a beautiful & open-source tool for debugging, testing and building with HTTP(S) on Windows, Linux & Mac.
email & SMTP testing tool with API for developers.
Mailpit is a small, fast, low memory, zero-dependency, multi-platform email testing tool & API for developers. It acts as an SMTP server, provides a modern web interface to view & test captured emails, and contains an API for automated integration testing.
The code runner for PHP 💫. The PHP Scratchpad
Enjoy coding and debugging in an editor designed for fast feedback and quick iterations. It's like a shell for your application – but with multi-line editing, code completion, and more.
A debugger for your CI pipeline.
Interactive CI pipeline debugger. Step through GitHub Actions workflows locally with Docker. Step through GitHub Actions workflows locally with Docker. Pause before each step, inspect the environment, drop into a shell, modify variables, re-run failed steps — without pushing and waiting.
Stratoshark lets you explore and analyze applications at the system call level using a mature, proven interface based on Wireshark.
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Java Dynamic Reverse Engineering and Debugging Tool.
JDBG is a powerful Java debugger and reverse engineering tool that operates at runtime. It is attachable and is not limited by agent restrictions. JDBG leverages an injected DLL along with JNI and JVMTI to provide deep insight into Java applications.
🚀 Fast detection of composer dependency issues (unused dependencies, shadow dependencies, misplaced dependencies)
Debug your AI agent locally.
Give your coding agent the power to write and run agent evals. The local debugger your agent is missing. Watch your agent think locally, the moment it happens: every token, every tool call, every decision.
Give Claude Code the power to read your traces, write evals against your codebase, and fix what's broken.
Debugbar for Laravel.
Laravel Debugbar is a package that integrates PHP Debug Bar with Laravel to debug database queries and profile other information.
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Idle: The Chillest Container You'll Ever Run 💤.
📦 Idle is a minimalist container designed to do nothing but idle indefinitely.
Idle is written in minimalist C. It includes graceful handling of SIGINT/SIGTERM signals for a clean shutdown, ensuring it's a well-behaved citizen in your Kubernetes cluster.
MailCatcher runs a super simple SMTP server which catches any message sent to it to display in a web interface. Run mailcatcher, set your favourite app to deliver to smtp://127.0.0.1:1025 instead of your default SMTP server, then check out http://127.0.0.1:1080 to see the mail that's arrived so far.
Checkov scans cloud infrastructure configurations to find misconfigurations before they're deployed.
Checkov uses a common command line interface to manage and analyze infrastructure as code (IaC) scan results across platforms such as Terraform, CloudFormation, Kubernetes, Helm, ARM Templates and Serverless framework.
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Docker image to hack the PHP interpreter.
A convenient Docker image to track PHP bugs (segmentation faults), to develop extensions or the PHP interpreter itself.
Understand and fix bugs faster
Ray is a desktop application that serves as the dedicated home for debugging output. Send, format and filter debug information from both local projects and remote servers.
A framework for finding JavaScript memory leaks and analyzing heap snapshots. Analyzes JavaScript heap and finds memory leaks in browser and node.js.
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bbdb uses Bash's internal debugging mechanism to provide a kind of debugger which will help you to trace and understand the execution of Bash scripts, even large and multi-files ones.
a debugger for Python.
An implementation of the Debug Adapter Protocol for Python.
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An interactive console program that allows traffic flows to be intercepted, inspected, modified and replayed. An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
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Watch SQL traffic in real-time with a TUI. Real-time SQL traffic viewer — proxy daemon + TUI / Web client.
sql-tap sits between your application and your database (PostgreSQL, MySQL, or TiDB), capturing every query and displaying it in an interactive terminal UI. Inspect queries, view transactions, and run EXPLAIN — all without changing your application code.
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Docker image that echoes request data as JSON; listens on HTTP/S, useful for debugging.
pg_shmemviz captures PostgreSQL's main and dynamic shared memory segments and presents named allocations, exact structure layouts, padding, pointer targets, and raw bytes in a local browser.
The capture uses an extension. Structure metadata comes from DWARF in the exact postgres executable used for the capture.
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A tool for exploring each layer in a docker image. A tool for exploring a docker image, layer contents, and discovering ways to shrink the size of your Docker/OCI image.
🍦 Never use print() to debug again.
Do you ever use print() or log() to debug your code? Of course you do. IceCream, or ic for short, makes print debugging a little sweeter.
✨A CLI tool for analyzing queries and DB tables for MySQL.
Web Debugging Proxy based on Chrome DevTools Network panel.
Simple, open source error tracking. Open source error, performance, and uptime monitoring.
Collect every error from your project in real time, organize them to make them useful, and receive alerts when and where you want...without breaking the budget.
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Free and Open Source RE Platform powered by Rizin. Cutter's goal is to be an advanced FREE and open-source reverse-engineering platform while keeping the user experience at mind. Cutter is created by reverse engineers for reverse engineers.
Your language isn’t broken, it’s doing floating point math. Computers can only natively store integers, so they need some way of representing decimal numbers. This representation is not perfectly accurate. This is why, more often than not, 0.1 + 0.2 != 0.3.
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php errors for cool kids.
whoops is an error handler framework for PHP. Out-of-the-box, it provides a pretty error interface that helps you debug your web projects, but at heart it's a simple yet powerful stacked error handling system.
The model IS the database. Query neural network weights like a graph database. No GPU required.
LARQL decompiles transformer models into a queryable format called a vindex (vector index), then provides LQL (Lazarus Query Language) to browse, edit, and recompile the model's knowledge.
debugs memory leak of running process, without recompiling or restarting, on GNU/Linux and FreeBSD.
Not maintained anymore, try libleak please.
a sleek new debug bar for Livewire.
Take your Livewire development to the next level with WireSpy. Instantly debug and interact with your components—inspect their state, modify it on the fly, and even time-travel through state changes to pinpoint issues. Stay on top of every event with a dedicated events page that displays dispatched events, the originating component, and the exact data payload. Plus, with the hot reload feature, any changes to your component files automatically refresh, keeping your workflow fast and efficient. WireSpy provides the power and precision you need to build and debug your Livewire apps.
Remote debugging AWS Lambda functions.
Lambda Live Debugger is an indispensable tool for debugging AWS Lambda functions from your computer, even though they are deployed in the cloud. The code runs with the same IAM permissions as in the cloud environment, and there's no need to redeploy when you make code changes. It supports Lambdas written in JavaScript or TypeScript. It requires almost no configuration. It is free and open source.
a network diagnostic tool.
Trippy combines the functionality of traceroute and ping and is designed to assist with the analysis of networking issues.
DNS Measurement, Troubleshooting and Security Auditing Toolset.
Ever been wondering if your ISP is hijacking your DNS traffic? Ever observed any misbehavior with your DNS responses? Ever been redirected to wrong address and suspected something is wrong with your DNS? Here we have a set of tools to perform basic audits on your DNS requests and responses to make sure your DNS is working as you expect.
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Your Claude is coding blind.
The missing DevTools for Claude Code — inspect session logs, tool calls, token usage, subagents, and context window in a visual UI. Free, open source.
Helium is a tool for discovering unused CSS across many pages on a web site. The tool is javascript-based and runs from the browser.
Elephantshark helps monitor, understand and troubleshoot Postgres network traffic: Postgres clients, drivers and ORMs talking to Postgres servers, proxies and poolers (also: standby servers talking to their primaries and subscriber servers talking to their publishers).
Elephantshark sits between the two parties in a PostgreSQL-protocol exchange, forwarding messages in both directions while parsing and logging them.
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