You know what is broken. Find out which rule it is.
Every WCAG reference is organized by rule number, which is useful once you know the number. People arrive the other way round, holding a symptom. This searches the 389 failures documented across all 86 criteria.
Plain words work better than jargon. Try “keyboard”, “dropdown”, “placeholder”, or “video”.
389 documented failures across 86 rules, searchable by what went wrong.
What you are searching
Each criterion page lists the ways we actually find it broken, in plain words rather than in the language of the standard. That is what this searches, so “placeholder” finds the contrast and labelling rules that placeholder text tends to break, and “hover” finds the keyboard and tooltip ones.
It matches wording, not meaning, and the order it returns things in carries no more authority than the matching does. A word that appears inside a longer word counts as a match, so read the whole list rather than trusting the top result. If nothing comes back, the failure may still be real and simply described differently, and the rule library or the 55-rule checklist will get you there.
Once you have the rule
Each rule page carries how to test it, what commonly fails it, the fix, and the W3C techniques that satisfy it. If you would rather work the other way, from a subject like forms or video, the fix subjects group all 432 techniques that way.