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H1 Checker
Paste a page's HTML source to check whether it has exactly one H1, none, or too many.
Open the page, right-click → View Page Source (or Ctrl/Cmd+U), select all, copy, and paste it here.
Result
Paste HTML and analyze to see results.
How to use it
- 01Open the page and view its source (Ctrl/Cmd+U).
- 02Copy the full HTML and paste it in.
- 03Click Check H1 tags.
Is my file uploaded?
No — this checks HTML you paste in yourself. The tool can't fetch arbitrary URLs directly because browsers block cross-site requests (CORS) for security, so it never sends your data anywhere either.
FAQ
- Why does having one H1 matter?
- It's a widely followed best practice for a clear page structure — one H1 as the main heading, with H2s and H3s organizing the content beneath it. Multiple H1s can dilute that structure for both users and search engines.
- Is having multiple H1s actually a Google ranking penalty?
- Google has said multiple H1s aren't inherently penalized, but keeping one clear H1 remains good practice for accessibility and content structure.
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Built by Ni Wayan Astari — Performance Marketer with a strong interest in data and technology. See more free tools or selected work.