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Heading Analyzer

Check H1-H6 heading hierarchy for proper nesting and SEO.

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Paste your HTML source. We'll map your heading hierarchy.

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How to Check Your Heading Structure

View Source on your page (Ctrl+U on Windows, Cmd+Option+U on Mac), copy the entire HTML, and paste it above. The tool finds every H1 through H6 tag, maps your heading hierarchy as a visual outline, and runs a checklist of SEO and accessibility rules. You'll see exactly where your heading structure breaks — skipped levels, missing H1s, duplicate text, empty tags — before search engines or screen readers do.

Everything runs in your browser. Your HTML never leaves your machine.

Why Heading Hierarchy Matters for SEO

Search engines use your heading tags to understand the structure and topics on your page. A clean H1 → H2 → H3 hierarchy tells Google what your page is about and how your content is organized. Skipping from H1 to H3, using multiple H1s, or having empty heading tags sends mixed signals about your page structure and can dilute your topical relevance.

Heading Best Practices for Accessibility

Screen reader users navigate pages by jumping between headings. A proper heading hierarchy acts as a table of contents — they can skip to the section they need without listening to the entire page. When you skip heading levels (H2 straight to H4) or leave heading tags empty, assistive technology loses that navigation structure. Your headings should make sense when read in isolation, without the surrounding content.

The One-H1 Rule

Every page should have exactly one H1 tag. It's the top-level heading that tells both users and search engines what this specific page is about. Multiple H1s dilute that signal — if everything is the main heading, nothing is. HTML5 technically allows multiple H1s inside sectioning elements, but every major SEO tool and Google's own documentation recommends sticking to one H1 per page.

Common Heading Mistakes

The most frequent heading issues: skipping levels (H1 to H3 with no H2), using headings for styling instead of structure, leaving heading tags empty, writing headings in ALL CAPS in the source HTML instead of using CSS text-transform: uppercase, and having multiple headings with identical text at the same level. Each of these confuses search engines, assistive technology, or both.

How many H1 tags should a page have? +
One. HTML5 technically allows multiple H1s inside sectioning elements like <article> or <section>, but in practice, SEO tools, screen readers, and Google all treat a single H1 as the primary page heading. Use H2-H6 for everything else.
Does heading order affect SEO? +
Yes. Google uses headings to understand the topical structure of your page. Sequential nesting (H1 → H2 → H3) creates a clear content outline that helps search engines parse your topics. Skipping from H1 to H3 won't necessarily tank your rankings, but it weakens the structural signal you're sending and makes it harder for crawlers to understand your content hierarchy.
Can I style text to look like a heading without using H tags? +
You can make any element look like a heading with CSS, but search engines and screen readers won't recognize it as one. Headings carry semantic meaning — they tell machines "this is a section title." A bold, large <div> looks right to sighted users but is invisible to everything else. Always use <h1> through <h6> for headings, then style them however you want.
What's the ideal H1 length? +
Aim for 20 to 70 characters. Shorter than 20 and you're probably not being descriptive enough. Longer than 70 and it may get truncated in search results or lose impact. Your H1 should clearly describe the page content in a single, scannable line — think of it as the headline a reader sees first.
Do H4-H6 headings matter for SEO? +
They carry less ranking weight than H1-H3, but they still contribute to your page's content structure. For SEO, H1-H3 do the heavy lifting. H4-H6 matter more for accessibility — screen reader users rely on the full heading tree to navigate long pages. Use them when your content genuinely needs that level of nesting, not just for visual styling.
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