The best tools and resources on the internet for Software Testing

Over 350+ awesome tools and resources on the internet to supercharge your testing.

A color contrast checker for modern CSS color formats.

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

Utilities to customize Windows

Resources and materials for learning various cybersecurity concepts and technologies.

Practice Pages For Automating and Testing

Running an adb commands dynamically

Lightweight SQLite editor for Windows

View JSON in a browser, with syntax highlighting, collapsible arrays and objects, and nice readable formatting.


A mutation testing tool for Python 3.3+ source code

Test your tests with mutation testing.


State of the art mutation testing system, providing gold standard test coverage for Java and the jvm.

Search exclusively on forum websites.

Automatically detect accessibility issues in web pages using AI

A curated list of snippets to get Web Performance metrics.

Modify HTTP request headers, response headers, and redirect URLs

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


An online tool to test responsive layouts that lets you view multiple device sizes simultaneously, just enter a URL to test.


Inspect a command's effects before modifying your live system

Kanboard is a free and open source Kanban project management software

The missing Chrome Devtools Element Selector

Receive SMS Online - 100% Free


An offline documentation browser for software developers and testers.

A user-friendly network monitoring tool, built with Rust, to help you easily keep track of your Internet traffic.

Check and suggests colors to meet the required WCAG or APCA contrast ratio.

JSON CrackFree with Paid Option

Seamlessly visualize your JSON, XML, TOML, YAML, CSV instantly into graphs!


A tool to help testers test by supporting the entire process of exploratory testing, from gathering evidence to generating test reports.

Use Faker.js UI to easiliy generate fake (but realistic) data for testing and development using Faker.js.

Scan your entire site with Google Lighthouse in 2 minutes (on average).

MockarooFree with Paid Option

Generate up to 1,000 rows of realistic test data in CSV, JSON, SQL, and Excel formats. Free!

FirecampFree with Paid Option

Firecamp is multi protocol API platform for Developers.

BugBugFree with Paid Option

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

Simple Text cleaner and formatter tool to perform complex operations.

JSON formatter and validator tool

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

Measure the performance of any Android app 🔦


A tool to test web content for accessibility and 508 compliance.


Taiko is an open source node.js library for testing modern web applications


Collection of 70+ testing and development productivity tools — all in one place!

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

The purpose of the project is to collect and share malware samples.

A set of free tools that includes a responsive design tester, detect fonts, Chat with any PDF and more.

Sniffing out credentials.

Offline-first web HTTP client

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