H1 & Heading Structure Checker

Enter any URL to see its H1–H6 outline. Find missing or multiple H1s, skipped levels, and empty headings.

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AI Search Insights for Heading Structure

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Headings are AI content signals

AI engines use heading hierarchy to understand what your page is about. A clear H1 → H2 → H3 structure helps Gemini, Perplexity, and ChatGPT accurately summarize your content and identify the main topics covered.

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H2s become AI answer section headers

When AI engines cite long-form content, they often reference specific sections by their H2 headings. Clear, descriptive H2s make it easier for AI to pull the right section into an answer — and give proper attribution.

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Skipped levels confuse AI parsing

Jumping from H1 to H4 makes it harder for AI engines to build a content outline. They may misinterpret section boundaries, leading to inaccurate summaries. Always follow sequential heading order for the clearest content structure.

Good heading structure helps AI cite you accurately. PatchMySEO tracks those citations. Try free audit →

What this H1 & heading checker does

Paste a page's HTML or enter a URL, and this free tool lists every heading (H1–H6), shows the outline, and flags problems — a missing H1, more than one H1, or skipped levels (like H2 jumping to H4). It runs in your browser; nothing is stored.

Headings are how both Google and AI engines understand what a page is about. A clean H1 → H2 → H3 order helps them read your structure, pull the right section into an answer, and rank you for the topics each heading covers.

How to fix the most common heading problems

No H1: add exactly one <h1> near the top that states what the page is about, in the words people search.
More than one H1: keep a single H1; turn the extra ones into <h2>. Multiple H1s blur the page's main topic.
Skipped levels: don't jump from H1 to H4. Go in order so the outline stays clear.
Vague headings: "Overview" says nothing; "How to fix a missing H1 tag" matches a real search and an AI answer section.

Frequently asked questions

Should a page have only one H1?

Yes. Use one H1 as the page's title, then H2s for main sections and H3s beneath them. One clear H1 is the strongest signal of what the page is about.

Do heading tags affect SEO and AI search?

They help both. Search engines use headings to understand structure and relevance; AI engines cite content by its section headings, so clear, descriptive H2s make it easier to be quoted accurately.

How do I check the H1 and heading tags of any URL?

Enter the URL above (or paste the HTML) and this tool fetches the page and lists every H1–H6 with its order, so you can spot a missing or duplicate H1 in seconds.

Is this H1 checker free?

Yes — free, no sign-up, and it runs in your browser.

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