Free accessibility tools

Quick checks for one thing at a time. They run in your browser: nothing you enter is sent to us.

• Color contrast checker

  The contrast ratio of a text and background color, with WCAG AA and AAA results.

• Heading structure checker

  The outline of a page’s headings, with missing h1, skipped levels and empty headings.

• Alt text checker

  Images without alt text, and alt text that won’t help someone who can’t see the image.

• Free accessibility checker

  Check a whole page against WCAG 2.2 A and AA in a real browser, with how to fix each issue.