How to read the results
A good page has exactly one <h1> and never skips heading levels (for example, jumping from an <h2> straight to an <h4>). Every meaningful image needs descriptive alt text; decorative images should have empty alt (alt="") so screen readers skip them. This tool flags missing alt attributes — but only a person can judge whether the alt text is actually meaningful. For a full review, see our checklists or book an audit.