A color contrast checker for modern CSS color formats.

Practice Pages For Automating and Testing

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

Search exclusively on forum websites.

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

The missing Chrome Devtools Element Selector

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

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

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

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

Simple Text cleaner and formatter tool to perform complex operations.

JSON formatter and validator tool

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.

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

Generate regex patterns by inputting an example of the text.

A free online ADA and WCAG compliance checker.

Explore a practice test site that has 25 real bugs planted inside.

Web performance report every week in your inbox.

Easy web performance trace sharing

Commonly used software development and testing tools

Powerful and easy to use PDF tools made for you

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

GUI client for gRPC/gRPC-Web

Makes JSON easy to read. Open source.

Generate a matching regular expression from the test cases you provide

Online REST API client

Analyze webpack production bundle

Cyrilex is a regular expression tester and visualizer

Browser templates for Browser In The Browser (BITB) attack.

Analyze HTML size and catch bloat like inline images, large React hydration state, or code duplication.

Supports editing text and images in a PDF across all platforms.

A GitHub Action that lets you automatically run tests against WebPageTest on code changes.

A beautiful JSON explorer packed with features

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

A web performance tool providing deep diagnostic information about how a page performs under a variety of conditions.

Check compliance with WCAG 2.0 minimum contrast

A repository of Test Cases and Scenarios

An open-source web accessibility checker

online JSON formatting and processing tool with powerful functions

Aggregated set of useful tools that every developer and tester may need once in a while.

Make your website smaller and faster by minifying the JS & CSS code!

A free online collaborative whiteboard app