Multiple H1 headings

What this check looks for

Checks whether the page has more than one <h1> element.

Why it matters

While HTML5 technically allows multiple H1s, using several can muddy the page's main-topic signal and usually points to a document outline that isn't structured intentionally. A single H1 followed by H2s and H3s in a logical order makes the hierarchy clear for screen readers and search engines. Demote secondary headings to H2 or lower so one H1 owns the page topic.

How to fix it

<!-- Keep a single H1; step down section headings to H2/H3 -->
<h1>Image SEO Optimization</h1>
<h2>Choosing the right file format</h2>
<h2>Writing descriptive alt text</h2>

Go deeper

• Heading hierarchy for SEO →