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Top 23 Debugging Open-Source Projects
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x64dbg
An open-source user mode debugger for Windows. Optimized for reverse engineering and malware analysis.
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Project mention: The Safari MCP server for web developers β WebKit | news.ycombinator.com | 2026-07-03
I have been using Chrome's official MCP devtools server since Nov 2025.
Before that I used Chrome's web drivers but MCP is faster and more capable.
https://github.com/ChromeDevTools/chrome-devtools-mcp
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mitmproxy
An interactive TLS-capable intercepting HTTP proxy for penetration testers and software developers.
Project mention: How to audit what your IDE extension actually sends to the cloud | dev.to | 2026-05-22mitmproxy is the gold standard here. It's free, open source, and Python-scriptable.
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httpie
π₯§ HTTPie CLI β modern, user-friendly command-line HTTP client for the API era. JSON support, colors, sessions, downloads, plugins & more. (by httpie)
httpie is easier to read than curl when testing APIs manually.
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reactotron
A desktop app for inspecting your React JS and React Native projects. macOS, Linux, and Windows.
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Project mention: Ask HN: What's the biggest problem you ever prevented? | news.ycombinator.com | 2026-06-13
2. https://github.com/danluu/post-mortems
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debug
A tiny JavaScript debugging utility modelled after Node.js core's debugging technique. Works in Node.js and web browsers
Project mention: Less is safer: how Obsidian reduces the risk of supply chain attacks | news.ycombinator.com | 2025-09-19 -
Project mention: Week 1 β My First Open-Source Contribution (Hacktoberfest 2025) | dev.to | 2025-10-13
After registering on Hacktoberfest, I forked the repository, cloned it locally, and created a new branch using git checkout -b issue-3270-robust-dprintf. Since I use macOS, I installed Determinate Nix to emulate a Linux-like environment. Once inside the shell, I installed dependencies with python -m pip install -e ., which set up the project for local development.
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Agreed. While not directly applicable, I was a huge fan of Mozilla's rr [0] in undergrad. Quoting their site:
> rr records a group of Linux user-space processes and captures all inputs to those processes from the kernel, plus any nondeterministic CPU effects performed by those processes (of which there are very few).
I think the solution will resemble that. You don't control the LLM, sure. But you can control what it sees, and maybe that's good enough.
[0] https://rr-project.org/
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gdbgui
Browser-based frontend to gdb (gnu debugger). Add breakpoints, view the stack, visualize data structures, and more in C, C++, Go, Rust, and Fortran. Run gdbgui from the terminal and a new tab will open in your browser.
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Project mention: Ask HN: Why is Claude so horrible? Are they paying people to glaze it on X? | news.ycombinator.com | 2026-02-13
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Android Debug Database
A library for debugging android databases and shared preferences - Make Debugging Great Again
I am Amit Shekhar, Founder @ Outcome School, I have taught and mentored many developers, and their efforts landed them high-paying tech jobs, helped many tech companies in solving their unique problems, and created many open-source libraries being used by top companies. I am passionate about sharing knowledge through open-source, blogs, and videos.
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hardhat
Hardhat is a development environment to compile, deploy, test, and debug your Ethereum software.
Project mention: Stop Guessing, Start Proving: A Guide to Stateful Fuzzing in Foundry | dev.to | 2026-04-27Hardhat
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gef
GEF (GDB Enhanced Features) - a modern experience for GDB with advanced debugging capabilities for exploit devs & reverse engineers on Linux
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Project mention: π Headlamp: A Modern Kubernetes UI Youβll Actually Enjoy Using | dev.to | 2026-03-30
Visit the Headlamp GitHub Releases page.
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Requestly
Requestly was built to save developers time by intercepting and modifying HTTP Requests. It has now developed into an open-source alternative to Charles Proxy and Telerik Fiddler that works directly in browsers without VPN and proxy Issues. It is used by more than 200,000+ front-end developers and 11,000+ companies worldwide.
Project mention: API Testing Tools Worth Knowing in 2026 - Alternatives to Postman | dev.to | 2026-06-29Requestly: https://requestly.com
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NOTE:
The open source projects on this list are ordered by number of github stars.
The number of mentions indicates repo mentiontions in the last 12 Months or
since we started tracking (Dec 2020).
Debugging discussion
Debugging related posts
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Show HN: A free and open source session recording Chrome extension
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Why don't schools teach debugging? (2014)
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The Log Is the Agent
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Stern: Multi pod and container log tailing for Kubernetes
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ESP32 Bit Pirate, Hardware Hacking tools, Debug/explore hardware in the browser
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Ask HN: What's the biggest problem you ever prevented?
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Show HN: Webhix β Self-hosted webhook.site alternative in a single Go binary
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A note from our sponsor - SaaSHub
www.saashub.com | 11 Jul 2026
Index
What are some of the best open-source Debugging projects? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | x64dbg | 48,852 |
| 2 | chrome-devtools-mcp | 45,745 |
| 3 | mitmproxy | 44,164 |
| 4 | httpie | 38,198 |
| 5 | DoraemonKit | 20,415 |
| 6 | Modern-CPP-Programming | 15,885 |
| 7 | reactotron | 15,574 |
| 8 | post-mortems | 12,145 |
| 9 | debug | 11,448 |
| 10 | pwndbg | 10,628 |
| 11 | rr | 10,576 |
| 12 | gdbgui | 10,338 |
| 13 | icecream | 10,056 |
| 14 | PlatformIO | 9,324 |
| 15 | Android Debug Database | 8,671 |
| 16 | hardhat | 8,495 |
| 17 | gef | 8,264 |
| 18 | viztracer | 7,682 |
| 19 | headlamp | 6,800 |
| 20 | Under-the-hood-ReactJS | 6,793 |
| 21 | Requestly | 6,718 |
| 22 | clockwork | 5,943 |
| 23 | cpplinks | 5,257 |
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