The best Software Testing tools and resources on the internet.

Over 500+ awesome tools and resources on the internet to supercharge your testing.

What QA Leaders Need to Know About AI in 2026

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Everyone's talking about AI, but what does it actually take to build quality into AI-powered software? Hear from engineering leaders at Google Cloud, Salesforce, and more as they share real-world lessons on enterprise AI testing, agentic workflows, and what's next for QA.

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Prestige

A text-based HTTP client in the browser, an interface-less Postman.

Sitespeed.io

Performance Testing

Performance Testing

Automated Accessibility Example Lib

Library of accessibility automation examples that use multiple different testing frameworks

Accessibility Testing

MCPLab

Test how well LLM agents use your MCP tools, compare different models, and track quality over time.

SlimImg

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

Heynote

A dedicated scratchpad for developers and testers

Exploratory Testing

ct.css

A diagnostic CSS snippet that exposes potential performance issues in your page’s `head` element.

Performance Testing

Retrofit

Easily turn API Responses into Plain Old Java Objects (POJOs)

Automated Checking

Zap

Scanning tool for security vulnerabilities

Security Testing

Android UI Testing Cookbook

An open source documentation about Android UI testing.

Learn Software Testing

Hemmelig

Paste a password, confidential message, or private data.

Intellij IDEA

Free - Community Edition

For web and enterprise development

Login C-Sharp Playwright Automation

C# automation framework using Playwright + NUnit for login testing. Built entirely with GitHub Copilot prompts. Includes Page Object Model, CI/CD with GitHub Actions, and Allure reporting.

HTTPie

HTTPie for Mac, Windows, and Linux

Traffic Listener

Wapiti

Web vulnerability scanner written in Python3

Security Testing

Uncompressed JavaScript bytes per character

Fetch and process the JSON data from a WebPageTest result.

Performance Testing

Poku

A cross-platform test runner that brings the JavaScript essence back to testing.

Automated Checking

DataGen

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

Test Data Generation

lemoncheesecake

Python framework for end-to-end / QA testing

Automated Checking

Sublime Text

$99, evaluation is free and time is not limited

Text Editing, Done Right

LINQPad

LINQPad is a software utility targeted at .NET Framework development.

Cypress Chrome Recorder

Export Cypress Tests from Google Chrome DevTools' Recorder

{JSON} Placeholder

Free fake API for testing and prototyping. Powered by JSON Server + LowDB

Test Data Generation

JPad

Java Scratchpad - Instantly write java snippets and see nicely formatted results.

checka11y.css

A CSS stylesheet to quickly highlight a11y concerns.

Accessibility Testing

XCTest

Apple’s official testing framework for unit tests.

Automated Checking

headers 2 curl.

headers 2 curl. Provided a set of HTTP request headers, output the curl command line for generating that set.

Traffic Listener

AnyPass

Multiplatform app for your all-in-one password management.

browserable

Open source and self-hostable browser automation library for AI agents

Automated Checking

SLS Test Tools

Custom Jest Assertions for Serverless integration testing.

Automated Checking