Every page starts from one real question, such as what WCAG 2.5.8 asks for or how to turn off a screen reader, and tries to answer it completely on one page.
Our sources
- The WCAG standard and the W3C Understanding documents for every success criterion.
- Official pages of regulators and governments for anything legal, and the makers’ own help pages for screen readers and apps.
- Our own testing with a keyboard, browser tools and screen readers.
Drafting and checking
We use AI writing software to help with research notes and first drafts. A person then rewrites each page, checks every rule and number against the standard, runs each code example, and removes anything that cannot be confirmed. Contrast ratios on the site are calculated with the WCAG formula, not copied from elsewhere.
The tools
The contrast checker, alt text checker, alt text generator and WCAG checklist are small programs that run in your browser. They send nothing to us and save nothing. The alt text generator writes from the words you type; it does not look at your image.
Keeping pages current
Standards and laws change slowly but they do change. Each page shows the date it was last checked, and we update pages when W3C or a regulator publishes something new.
See also our editorial policy.