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JavaScript developer-tools

Open-source JavaScript projects categorized as developer-tools
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Top 23 JavaScript developer-tool Projects

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  1. bruno

    Opensource IDE For Exploring and Testing API's (lightweight alternative to Postman/Insomnia)

    Project mention: Deep Dive: How Bruno 1.0 Stores API Tests Locally vs. Postman 11.0 Cloud Sync | dev.to | 2026-04-28

    After 6 months of benchmarking, case study analysis, and real-world testing, our recommendation is clear: choose Bruno 1.0 if you are an engineering team that values performance, Git integration, and zero vendor lock-in. Our data shows Bruno outperforms Postman 11.0 in every local storage metric: 400ms faster startup for 1000+ test suites, 6x lower storage overhead per test, and zero sync latency. The case study above shows teams can save $2k+ per year in licensing costs and $18k+ per year in engineering time by switching to Bruno. For teams with heavy non-technical collaboration needs, or very small test suites (<100 tests), Postman 11.0’s free tier remains a viable option, but we recommend exporting collections to Bruno for all engineering use cases. The API testing landscape is shifting toward local-first tools to avoid cloud vendor lock-in, and Bruno 1.0 is leading that charge. Try Bruno today: download it from https://github.com/usebruno/bruno, and migrate your Postman collections in minutes using the native import tool.

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  3. lighthouse ci action

    Automated auditing, performance metrics, and best practices for the web.

    Project mention: What Happens When You Type a URL? Web Architecture Explained Simply | dev.to | 2026-06-15

    Tools like Lighthouse show you exactly which resources are blocking your page.

  4. eruda

    Console for mobile browsers

  5. heynote

    A dedicated scratchpad for power users

    Project mention: Zed is 1.0 | news.ycombinator.com | 2026-04-29

  6. reactivesearch

    Search UI components for React and Vue

  7. ponytail

    Makes your AI agent think like the laziest senior dev in the room. The best code is the code you never wrote.

    Project mention: Ponytail – make your AI agent think like the laziest senior dev in the room | news.ycombinator.com | 2026-06-14

  8. cml

    ♾️ CML - Continuous Machine Learning | CI/CD for ML

  9. Boop

    A scriptable scratchpad for developers. In slow yet steady progress.

  10. react-proto

    :art: React application prototyping tool for developers and designers :building_construction:

  11. React-Sight

    Visualization tool for React, with support for Fiber, Router (v4), and Redux

  12. playwright-skill

    Claude Code Skill for browser automation with Playwright. Model-invoked - Claude autonomously writes and executes custom automation for testing and validation.

    Project mention: I Tried and Failed to Rebuild the 1996 Space Jam Website with Claude | news.ycombinator.com | 2025-12-07

    Just use Playwright Skill (https://github.com/lackeyjb/playwright-skill). It is a game changer. Otherwise it is Claude the Blind, as OP mentioned.

  13. pro-workflow

    Claude Code learns from your corrections: self-correcting memory that compounds over 50+ sessions. Context engineering, parallel worktrees, agent teams, and 17 battle-tested skills.

    Project mention: Stop Rebuilding Your Claude Code Setup - Scaffold It Once with Worclaude | dev.to | 2026-04-16

    The workflow draws from Boris Cherny's tips (creator of Claude Code at Anthropic), patterns from Affaan Mir's everything-claude-code (Anthropic hackathon winner), Karpathy's coding principles, and community repos like pro-workflow.

  14. workly

    A really simple way to move a function or class to a web worker. 🏋️‍♀️→ 😄

  15. pythagora

    Generate automated tests for your Node.js app via LLMs without developers having to write a single line of code.

  16. zeroshot

    Your autonomous engineering team in a CLI. Point Zeroshot at an issue, walk away, and return to production-grade code. Supports Claude Code, OpenAI Codex, OpenCode, and Gemini CLI.

    Project mention: Covibes Covibing is for humans and AI | news.ycombinator.com | 2026-01-10

  17. documind

    Open-source platform for extracting structured data from documents using AI.

  18. solhint

    Solhint is an open-source project to provide a linting utility for Solidity code.

  19. elm-live

    ⚡ A flexible dev server for Elm. Live reload included.

  20. webDevsCom

    :heart_eyes: All kinds of resources for Developers :trident: in one place.

  21. httptoolkit-server

    The backend of HTTP Toolkit

  22. ethora

    SDK monorepo for Ethora chat / messaging platform. (1) Pick an SDK for your frontend stack. (2) Integrate manually or using ethora-setup. (3) Optionally configure app settings, deploy AI agents etc. Server: ethora.com cloud [free]. Dedicated server + SLA option for enterprise customers.

  23. find

    A find-in-page extension for Chrome and Firefox that supports regular expressions.

  24. Lynkr

    Streamline your workflow with Lynkr, a CLI tool that acts as an HTTP proxy for efficient code interactions using Claude Code CLI.

    Project mention: How to Configure LibreChat with Lynkr Using a Custom OpenAI-Compatible Endpoint | dev.to | 2026-06-16

    Lynkr is an open-source LLM gateway built for coding assistants, agents, and MCP-heavy workflows. It gives you one OpenAI-compatible endpoint in front of multiple providers, with routing, caching, and cleaner model infrastructure behind it.

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).

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Index

What are some of the best open-source developer-tool projects in JavaScript? This list will help you:

# Project Stars
1 bruno 44,862
2 lighthouse ci action 30,346
3 eruda 21,037
4 heynote 5,304
5 reactivesearch 4,921
6 ponytail 4,834
7 cml 4,177
8 Boop 4,125
9 react-proto 3,455
10 React-Sight 2,867
11 playwright-skill 2,754
12 pro-workflow 1,907
13 workly 1,880
14 pythagora 1,821
15 zeroshot 1,503
16 documind 1,474
17 solhint 1,125
18 elm-live 1,067
19 webDevsCom 720
20 httptoolkit-server 551
21 ethora 536
22 find 479
23 Lynkr 468

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