The best Software Testing tools and resources on the internet.

SMTP server & web interface for viewing and testing emails during development.

AI-powered JMeter script generator and performance analyzer from Swagger/OpenAPI or plain English, with automated bottleneck insights and PDF reporting.

pytest plugin for semantic LLM output testing — validate meaning, not just shape

Use any Linux distribution inside your terminal.

An nginx playground website created by Julia Evans where we can paste the nginx configuration and test it out.

A Gorgeous HTML/CSS Reporter for Mocha.js

Supercharge your JMeter performance testing with AI-driven orchestration and analysis.

Monitors the health and web traffic of servers, microservices, Kubernetes/Kafka clusters, containers, and AWS services.

Use these guidelines for writing good Gherkin scenarios. Feed it as context to AI specs, agents, and skills.

Temporary and reusable inbox at your fingertip

The open source infrastructure as code tool. A fork of Terraform.

This extension supports full jest features in vscode environment to make testing more intuitive and fun.

API-first testing framework focusing only on testing Node.js (backend) applications

Converts all the Postman requests, including tests, variables, ... to K6 scripts

Offline-first web HTTP client

An easy-to-use, AI-powered regular expressions generator.

Fast, native mobile automation without the Appium server. Inspect layout trees in real-time, record gestures, and author tests with clean Playwright ergonomics.

Build your own cloud testing infrastructure.

Easy web performance trace sharing

A lightweight CLI tool to run tests on git-staged files before commit pushes.

Load test any system with a distributed cluster

Auto GPT Agent which automatically fixes code based on failing tests.

Hypothesis is a modern implementation of property based testing, designed from the ground up for mainstream languages.

A mutation testing tool for Python 3.3+ source code

Mock API by intercepting requests on the network level. Seamlessly reuse the same mock definition for testing, development, and debugging.

Test sites on multiple devices in one tab. Improve development, UI/UX, & QA with live previews.

Commonly used software development and testing tools

All the Fake Data for All Your Real Needs

A high-performance load testing tool, written in Go.

Open source Postman alternative with type safety built in.