The best Software Testing tools and resources on the internet.

Capture or record any area of your screen and share it with a single press of a key.

HTTP load tester and benchmarking utility

JS performance

A curated repository of highly optimized system prompts and templates for QA engineering tasks.

Snapshot-based stub/mocking of APIs.

Simplify API Testing with Mock Data

A command line search tool.

Thunder Client is a lightweight Rest API Client Extension for Visual Studio Code

Differencing and merging tool for Windows

The free C/C++ and Fortran IDE.

A Python-based synthetic data generation library built for developers, data engineers, and ML practitioners.

Gray box end-to-end testing and automation framework for mobile apps

Security and reliability for JavaScript applications

Open source screen reader

Web Debugging Proxy

Checks contrast for WCAG compliance

An Android analytics library created using Kotlin.

Multi location based load testing

Easily network traffic monitoring with view, monitor, and block traffic from other.

Google Addon

Get a better understanding of your application performance and behavior with the debugbar.

Track and monitor server hardware, uptime, response times, and incidents in real-time with beautiful visualizations

Static analysis at ludicrous speed.

It's a cross-platform Node.js desktop automation framework.

Opensource tool to build end-to-end tests 98% faster utilizing trace-based testing.

Your shell history: synced, queryable, and in context

Generate a visualization of your JSON, XML, CSV, YAML, SVG, .INI, serialized, hex, base64, or binary data local only, and share data via a URL

Real-time Python regular expression editor

Free LLM API pricing comparison. Compare GPT-5, Claude, Gemini & DeepSeek costs instantly. Updated daily with official prices from OpenAI, Anthropic & more.

A custom JMeter plugin that jumps to a target Transaction Controller when any sampler fails.