A11ygator

A11ygator

A web tool to analyze websites against WCAG rules.
AChecker

AChecker

This tool checks single HTML pages for conformance with accessibility standards.
ADG

ADG

A guide for designing and implementing fully accessible websites.
ANDI

ANDI

Accessibility testing tool for web content. This is an open source project created by the Accessible Solutions Branch of the Social Security Administration.
Accessibility Insights

Accessibility Insights

To find and fix accessibility issues. Quickly spot accessibility errors with visualizations and learn how to fix issues with simple guidance. Run FastPass to swiftly catch most common accessibility issues in less than 5 minutes. Verify UI Automation properties using Live Inspect. Investigate contrast ratios using Color Contrast Analyzer.
Axe

Axe

Accessibility for development teams. It is ideal for development teams to test their Web or Android applications to help identify and resolve common accessibility issues. Built to scale with your needs, users have run axe for everything from ad-hoc single page tests to testing hundreds of thousands of pages while integrated into existing CI/CD processes.
Color Oracle

Color Oracle

A color blindness simulator for Windows, Mac and Linux. It takes the guesswork out of designing for color blindness by showing you in real time what people with common color vision impairments will see. It applies a full screen color filter to art you are designing, independently of the software in use.
ColorBox

ColorBox

A web app that algorithmically builds accessible color systems.
Colorable

Colorable

A web-based contrast tool.
Contrast

Contrast

Provides access to WCAG color contrast ratios. It is the difference in luminance or color that makes an object (or its representation in an image or display) distinguishable. In visual perception of the real world, contrast is determined by the difference in the color and brightness of the object and other objects within the same field of view.
Contrast Checker

Contrast Checker

Text contrast with object background.
Lambdatest

Lambdatest

Interactive and Automated Cross Browser Testing.
Palette Builder

Palette Builder

Accessible color combinations.
UserWay

UserWay

Accessibility plugins that work without refactoring your website's existing code and will increase compliance with WCAG 2.1 , ATAG 2.0 , ADA ,& Section 508 requirements.