The best Software Testing tools and resources on the internet.

Regular Expression Visualization Site - Create a Diagrams from your regular expressions

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

Collection of classic Macintosh system releases and software accessible from the web browser.

A tiny, zero-dependency keep-alive JSON POST load tester in Python for checking API headroom under concurrency.

Compress JPG, PNG & WebP images locally in your browser. No uploads, privacy-safe, free image optimization with up to 90% size reduction.

Record videos from the camera or capture from the screen.

Operating System

Simple network mocking for your GraphQL API.

A Java library for processing media data. Supported media formats include still images, video, audio and meta-data.

This simple yet effective tool helps you compare two texts, and reveals the similarities and differences.

An email and SMTP testing tool with API for developers and automated integration testing.

free web app to perform functions like DNS lookups, port checks port scans, IP Information gathering, hash generation, blacklist checks, subnet calculation and more..

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

An online tool to enter a URL to see how well the images are optimized and what you can do to improve them.

iOS touch synthesis library

Collect your thoughts and notes without leaving the command line.

A Gorgeous HTML/CSS Reporter for Mocha.js

The optimal flow for Jest based testing in VS Code

Inspect a command's effects before modifying your live system

Automate web app testing easier than ever. Without excessive costs. Faster than coding. Free forever.

Smartly scan web pages and extract AI-enhanced XPaths for automation.

one-stop resource with tons of little utilities for formatting, editing, generating, minifying, and so on.

Educating customers on web-accessibility overlays.

Debug remotely and easily with a range of features like chrome devtool.

Community curated list of templates for the nuclei engine to find security vulnerabilities in applications.

Password generator and password manager for Windows with full Unicode support.

A tool to optimize the unit testing process.

Differencing and merging tool for Windows

Locate web elements using natural language. Powered by LLM. Works with Selenium

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