What to verify.
VISUAL
Body text at least sixteen pixels Contrast ratio at least 4.5 to 1 Text resizable to 200 per cent without breaking No information conveyed by colour alone No text baked into images Reduced motion preference respected
STRUCTURE
One main heading per page, levels in order Descriptive headings Page language declared Unique descriptive page titles
Landmarks used: header, nav, main, footer
A skip link
INTERACTION
Everything reachable by keyboard Visible focus indicator Real buttons and links, not styled containers Controls have accessible names Touch targets large enough
FORMS
Visible labels on every field Errors identified, explained and announced Input preserved on error Required fields marked in text
MEDIA
Alt text on meaningful images, empty on decorative Captions on video Transcripts where practical No autoplay with sound
THE FIVE THAT MATTER MOST
Contrast, labels, keyboard access, alt text, heading structure.
