SEO
H1 Tag Checker
Check if a webpage has an H1 tag, and if it's properly optimised for SEO.
H1 Status
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How It Works
Paste your HTML. The tool counts H1 tags and gives advice on their content length and uniqueness.
Example
One H1: 'Free Online Calculators' → ✓
Frequently Asked Questions
Why is the H1 tag important for SEO?
It tells search engines the main topic of the page.
Can I have multiple H1s if I use HTML5 sections?
Technically yes, but SEO best practice still recommends a single top‑level H1.