testing

JavaScript API for Chrome and Firefox

Playwright is a framework for Web Testing and Automation. It allows testing Chromium, Firefox and WebKit with a single API.

Storybook is the industry standard workshop for building, documenting, and testing UI components in isolation

Open-Source API Development Ecosystem • https://hoppscotch.io • Offline, On-Prem & Cloud • Web, Desktop & CLI • Open-Source Alternative to Postman, Insomnia

💻 A fully functional local AWS cloud stack. Develop and test your cloud & Serverless apps offline

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

Delightful JavaScript Testing.

A toolkit with common assertions and mocks that plays nicely with the standard library

📗🌐 🚢 Comprehensive and exhaustive JavaScript & Node.js testing best practices (August 2025)

Test your prompts, agents, and RAGs. Red teaming/pentesting/vulnerability scanning for AI. Compare performance of GPT, Claude, Gemini, DeepSeek, and more. Simple declarative configs with command line and CI/CD integration. Used by OpenAI and Anthropic.

Learn Go with test-driven development

☕️ Classic, reliable, trusted test framework for Node.js and the browser

Node.js test runner that lets you develop with confidence 🚀

JavaScript Testing utilities for React

🐐 Simple and complete React DOM testing utilities that encourage good testing practices.

Faker is a Python package that generates fake data for you.

GoReplay is an open-source tool for capturing and replaying live HTTP traffic into a test environment in order to continuously test your system with real data. It can be used to increase confidence in code deployments, configuration changes and infrastructure changes.

Hurl, run and test HTTP requests with plain text.

Open-source platform for creating safe, isolated production sandboxes for API, integration, and E2E testing.

Simple JavaScript testing framework for browsers and node.js