Tools to test accessibility

• Windows High Contrast Mode.

• Keyboard testing

• Dubbot

• MagentaA11y

General accessibility checkers

• Axe-devtools
• axe-core-gems
• Wave
• Lighthouse
• Pa11y

Color contrast

• TPGi Color contrast analyzer
• WebAIM contrast checker
• rgba to rgb converter – most contrast checkers don’t account for transparency, so you can use this tool to convert an rgba value and its background color into a single rgb or hex value for use in a contrast checker.
• Deque color contrast analyzer

Screen readers

• (MacOS) Voice over with Safari.
• (Windows) NVDA or JAWS with Chrome
• (Windows) NVDA with Firefox
• (Windows) NVDA or JAWS with Edge
• Mobile – Android: Talkback
• Mobile – IOS: VoiceOver

Markup validator

• W3C Markup Validator service