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Top 23 TypeScript Devtool Projects
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In this post, we'll dive into implementing Optimistic UI in a Remix.run application, combined with Mock Service Worker(MSW) for robust API mocking and intercepting API requests into our application. Essential for development and testing. It allows us to intercept network requests and define mock responses right in the browser, simulating API behavior without needing a real backend running. This is invaluable for rapid development and testing edge cases like API failures.
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InfluxDB
InfluxDB – Built for High-Performance Time Series Workloads. InfluxDB 3 OSS is now GA. Transform, enrich, and act on time series data directly in the database. Automate critical tasks and eliminate the need to move data externally. Download now.
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repomix
📦 Repomix is a powerful tool that packs your entire repository into a single, AI-friendly file. Perfect for when you need to feed your codebase to Large Language Models (LLMs) or other AI tools like Claude, ChatGPT, DeepSeek, Perplexity, Gemini, Gemma, Llama, Grok, and more.
Project mention: Repomix – Pack your codebase into AI-friendly formats | news.ycombinator.com | 2025-05-24 -
Check Theatre.js 🔥
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openreplay
Session replay, cobrowsing and product analytics you can self-host. Ideal for reproducing issues and iterating on your product.
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jsonhero-web
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 Trigger.dev team.
Project mention: Show HN: JSON For You – Visualize JSON in graph or table views | news.ycombinator.com | 2024-09-24i am using https://jsonhero.io/ for a time and happy with it. but i will definitely check this out too.
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Project mention: Release Radar · August 2024: Major updates from the open source community | dev.to | 2024-09-05
It's important to test our code to ensure it works the way we intend. WebdriverIO is a test automation framework, for e2e, unit, and component testing in the browser. It's designed for Node.js and provides support for BDD/TDD test frameworks, and can be run locally or in the cloud. The newest major release has lots of breaking changes, and a bunch of new features. Testers can use new commands, define a custom hostname for component tests, and there's support for fake timers. Check out all the major and breaking changes in the changelog.
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The release is split into two phases. The first has happened and is the release of standalone client-based tools and the algorithm that powers the entire system. These tools let users generate OpenAPI specifications for any API, internal or external. There is a desktop application with a proxy that can easily be toggled to capture network traffic on a local port that then becomes an OpenAPI specification in real time. There is also a browser extension in the spirit of OpenAPI DevTools, and a website that lets users upload HAR files directly. There is also a command line tool.
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compodoc
:notebook_with_decorative_cover: The missing documentation tool for your Angular, Nest & Stencil application
Project mention: Générer des documentations pour une application Angular, Nest JS, Vue JS, Node JS | dev.to | 2024-07-20Découvrez la page officielle de Compodoc !
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omni-tools
Self-hosted collection of powerful web-based tools for everyday tasks. No ads, no tracking, just fast, accessible utilities right from your browser!
Project mention: Show HN: OmniTools – Self-Hosted Open-Source Swiss Army Knife for Everyday Tasks | news.ycombinator.com | 2025-03-30Which features depend on more than static hosting? I see the ffmpeg tools uses client-side wasm build.
https://github.com/iib0011/omni-tools/blob/main/src/pages/to...
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Project mention: CodeMirror: Extensible code editor component for the web | news.ycombinator.com | 2024-07-11
DevTools is open-source!
https://github.com/ChromeDevTools/devtools-frontend/blob/mai...
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pezzo
🕹️ Open-source, developer-first LLMOps platform designed to streamline prompt design, version management, instant delivery, collaboration, troubleshooting, observability and more.
Project mention: Show HN: PromptDoggy – Prompt Management for Product and Engineering Teams | news.ycombinator.com | 2024-08-22- https://github.com/pezzolabs/pezzo
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react-render-tracker
React render tracker – a tool to discover performance issues related to unintentional re-renders and unmounts
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devtools-x
Collection of offline first developer utilities available as non-electron desktop application. all in one place, cross-platform, 10MB app!
Impressive! But sadly closed source is a big limiting factor for me. I've been using the similar `devtools-x` for a couple of years now (https://github.com/fosslife/devtools-x) which hosts a bit of a smaller featureset but is still in active development. Nice work nonetheless!
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graphql-config
One configuration for all your GraphQL tools (supported by most tools, editors & IDEs)
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replay
Library that provides an API to replay and stringify recordings created using Chrome DevTools Recorder (by puppeteer)
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Project mention: Show HN: OpenAI's o1 building and running ML model with code interpreter | news.ycombinator.com | 2024-09-15
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Project mention: Show HN: Triplex, a visual workspace for React / Three Fiber | news.ycombinator.com | 2025-05-12
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react-router-devtools
Debug your apps, find hydration errors, trace your network and more in your react-router app with these devtools
https://github.com/forge-42/react-router-devtools
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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).
TypeScript Devtools discussion
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The Case for Edge AI: Are Small Language Models the Future of AI?
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What is NoDB?
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Show HN: Web RAG to generate perplexity like answers from your docs [in browser]
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A note from our sponsor - SaaSHub
www.saashub.com | 24 Jun 2025
Index
What are some of the best open-source Devtool projects in TypeScript? This list will help you:
| # | Project | Stars |
|---|---|---|
| 1 | msw | 16,846 |
| 2 | repomix | 17,077 |
| 3 | theatre | 11,767 |
| 4 | openreplay | 10,191 |
| 5 | jsonhero-web | 10,100 |
| 6 | WebdriverIO | 9,519 |
| 7 | cosmos-js | 8,495 |
| 8 | Eclipse Che | 7,053 |
| 9 | openapi-devtools | 4,210 |
| 10 | compodoc | 4,062 |
| 11 | omni-tools | 3,758 |
| 12 | devtools-frontend | 3,390 |
| 13 | lightproxy | 3,140 |
| 14 | pezzo | 2,932 |
| 15 | react-render-tracker | 2,384 |
| 16 | walletconnect-monorepo | 1,552 |
| 17 | apollo-client-devtools | 1,514 |
| 18 | devtools-x | 1,264 |
| 19 | graphql-config | 1,191 |
| 20 | replay | 1,177 |
| 21 | e2b-cookbook | 1,004 |
| 22 | triplex | 919 |
| 23 | react-router-devtools | 902 |
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