Open source devtools projects
Every project in the registry tagged devtools, ranked by real GitHub adoption.
Chrome DevTools for coding agents
the runtime your coding agents live on
Industry standard API mocking for JavaScript.
Run dozens of AI coding agents in parallel on your machine
Secure cloud environments for enterprise AI agents
🚀 PR Agent: The Original Open-Source PR Reviewer. This project is not the Qodo free tier.
Self-hosted session replay with complete data control
Practical patterns, starters & CLI tools for loop engineering with AI coding agents. Design systems that prompt and orchestrate agents (inspired by Addy Osmani
JSON Hero is an open-source, beautiful JSON explorer for the web that lets you browse, search and navigate your JSON files at speed. 🚀. Built with 💜 by the Tr
Graph database built for GraphRAG and multi-tenant AI apps
Next-gen browser and mobile automation test framework for Node.js
Sandbox for developing and testing UI components in isolation
A Chrome DevTools Protocol driver for web automation and scraping.
Catches mail and serves it through a dream.
Clockwork - php dev tools in your browser - server-side component
Context Graph for AI Native SDLC
A remote debugging platform you'll definitely find useful. Lightweight, cross-platform, out-of-box debugging tool
Ministack: Free, open-source local AWS emulator - 60+ services, Terraform compatible, real databases. Free forever. MIT licensed.
Git-native feature management for developers
The agent IDE that builds itself
A persistent workspace for development work that self-improves and continues beyond one session.
Bulk port forwarding Kubernetes services for local development.
:notebook_with_decorative_cover: The missing documentation tool for your Angular, Nest & Stencil application
The Chrome DevTools UI
The missing DevTools for Claude Code — inspect session logs, tool calls, token usage, subagents, and context window in a visual UI. Free, open source.
🕹️ Open-source, developer-first LLMOps platform designed to streamline prompt design, version management, instant delivery, collaboration, troubleshooting, obs
Network inspector for your backend
🚀 Click the dom to open your IDE and position the cursor at dom's source code location! 点击页面 dom 来打开 IDE 并将光标自动定位到源代码位置!
README file generator, powered by AI.
Interactive UI for local node modules inspection
Terminal security for developers and AI agents. Intercepts homograph URLs, pipe-to-shell, ANSI injection, obfuscated payloads, data exfiltration, and malicious
AI coding workstation: Claude Code + web UI + 8 AI CLIs + headless browser + 50+ tools
Pre-submission compliance scanner for the Apple App Store and Google Play. Scans code, privacy manifests, Android manifests, and IPA/APK/AAB binaries against th
Lightweight node server
Skybridge is a full-stack TypeScript framework for MCP Apps and ChatGPT Apps. Type-safe. React-powered. Platform-agnostic.
Web, Desktop & Mobile client and orchestrator for Codex, Claude Code, OpenCode, Pi, Cursor, Grok, Antigravity, Kimi, Augment Code, Qwen, fully end-to-end encryp
MCP server for GitLab: 100+ tools for projects, MRs, issues, pipelines, wikis and more via the GitLab REST/GraphQL API
CrossUI is a free Cross-Browser Javascript framework with cutting-edge functionality for rich web application. NEW: studio.crossui.com
The Nu Html Checker (vnu)
The runtime behind every E2B stack: Cloud, Enterprise, and your own machine.
AI-native workspace for local shells and remote machines.Zero Webview, zero OpenSSL, zero telemetry, and no app subscription.
Modern, scalable tools. Exceptional developer experience.
Captures your web app's complete development timeline - server logs, browser events, console messages, network requests, and automatic screenshots - in a unifie
Agentic AI framework for enterprise workflow automation.
Firefox Profiler — Web app for Firefox performance analysis
Collection of offline first developer utilities available as non-electron desktop application. all in one place, cross-platform, 10MB app!
Apollo Client browser developer tools.
the development environment for pros
A visual tool for inspecting and understanding your ESLint flat configs.
Improving GitHub's Forks list discoverability through automatic filtering. The project offers an online tool and a Chrome extension.
🐟 Yet Another bucket for lovely Scoop
Complete WebSocket Traffic Control with advanced proxy, simulation, and blocking capabilities
One configuration for all your GraphQL tools (supported by most tools, editors & IDEs)
Apache Geb: Very Groovy Browser Automation
Three.quarks is a general purpose particle system / VFX engine for three.js
Manage CI/CD pipelines from multiple providers (self hosted, desktop app and ios app )
Dev tools for python
A clojure tool to navigate through your data.
AI writes code. This automates everything else · 24 plugins · 49 agents · 44 skills · for Claude Code, OpenCode, Codex, Cursor, Kiro.
OpenHPC Integration, Packaging, and Test Repo
Related tags
Frequently asked questions
How many open source devtools projects are there?
This registry tracks 71 projects tagged devtools, with 370,278 GitHub stars between them. The most-adopted is chrome-devtools-mcp at 54,665 stars.
Are these devtools projects free to use?
Yes — 67 of the 71 carry an explicit open-source licence across 7 distinct licences, so there is no licence fee. Where a project also sells a hosted or enterprise version, the self-hosted path remains free.
Which devtools project should I choose?
The list above is ranked by GitHub stars, but stars measure attention rather than fit. Check three things on each card: the licence (permissive versus copyleft), the language it is written in, and the last-push date — a high-star project that has not been pushed in a year is a liability.
Are these devtools projects still maintained?
62 of the 71 were pushed in the last 90 days, and every card shows its exact last-push date so you can see the rest. Sort your shortlist by that date before committing to a migration.