Free H1 checker and heading structure analyzer. Audit H1–H6 via URL or pasted HTML for SEO and accessibility issues.
Fetches the HTML of a public page through Intellure so we can extract H1–H6 tags. Private or login-walled pages will fail — use Paste HTML instead.
Free online H1 checker and heading tag analyzer for SEO and accessibility. Enter any public page URL or paste HTML to extract H1–H6 tags, see a visual heading tree, count each level, and get a practical SEO score. The tool flags missing or multiple H1s, skipped levels (for example H2 → H4), empty headings, duplicate heading text, and headings that are too long. Use it before publishing drafts or when auditing live pages. Pair it with the On-Page SEO Checker, Title Tag Optimizer, and Meta Description Generator. Paste mode stays in your browser; URL mode fetches public HTML through Intellure only to extract headings. No signup required.
Heading tags (H1–H6) build the document outline. Search engines use that outline to understand topics and section relationships. Screen reader users jump heading-to-heading to skim. A page with one focused H1 and a logical H2–H6 tree is easier for both. This free H1 checker and heading analyzer flags missing or duplicate H1s, skipped levels, empty tags, duplicate labels, and overly long headings — then shows a visual tree you can fix from.
For a deeper walkthrough, read our heading tags SEO structure guide. To audit title, meta description, and more in one pass, use the On-Page SEO Checker.
Use a single H1 that names the page topic. Put the primary keyword where it reads naturally — clarity beats stuffing.
After an H2, use H2 or H3 next — not H4. Skipped levels break the outline for screen readers and muddle structure for crawlers.
Do not pick H4 just because it looks smaller in CSS. Style with classes; keep heading levels for meaning.
Avoid duplicate H2s that say the same thing. Short, specific labels help people jump sections and help search engines map topics.
Enter any public page URL, or paste source / a heading-only snippet from a draft before you publish.
Errors (missing or multiple H1s, empty tags) cost the most. Fix warnings like skipped levels and long headings next.
The indented H1–H6 tree shows how a screen reader or crawler walks your page. Fix jumps you can see at a glance.
After headings look clean, check title/meta and broader on-page signals with the linked tools below.
| Score | Meaning | What to do |
|---|---|---|
| 80–100 | Strong outline | Optional polish only — wording and keyword fit. |
| 50–79 | Needs cleanup | Fix skipped levels, long headings, or duplicates. |
| 0–49 | Broken structure | Restore a single H1 and a continuous hierarchy first. |
Scoring starts at 100, then subtracts 30 per error and 10 per warning. It is a practical checklist score — not a Google ranking number.
Full URL audit: title, meta, headings, images, technical tags, and more.
Craft titles that fit SERP length and match the H1 topic without stuffing.
Write click-worthy snippets with a live SERP-style preview.
See how title + description may appear in Google results before you publish.
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