Matan · WCAG · Understandable
Single H1 (WCAG)
One H1 keeps the heading outline unambiguous.
Pass condition in our engine: There is at most one H1.
This WCAG check is part of SEO-GEO scoring 2.2.1, last updated 2026-09-18. About 90 percent of the evaluation runs on the HTML we crawl, so you can verify the same pass condition with a free report.
1. Problem description
Multiple H1s are allowed in HTML5 but confuse heading navigation. Combine with the H1-present check: zero H1s fail that one; many H1s fail this one.
2. Most common causes
- Logo and article title both H1.
- Sectioning content each starting with H1.
3. How to fix it
- Keep a single H1; nest subsections as H2–H6.
Test this check
We fetch only this URL (plus robots.txt / llms.txt at the domain root when the check needs them). We do not crawl the rest of the site like a full report.
Scoring rules for the full site crawl are documented in methodology. Want every category at once? Generate a free report.
Get your free website audit
Enter your URL and receive a full audit with scoring and recommendations. No sign-up required.