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Heading tag checker (H1-H6)

By Tiago CostaUpdated on July 01, 2026

Paste a page URL and see the H1 to H6 count, the title hierarchy and the problems that hurt SEO. Right in your browser, no sign up.

Quick guide

Everything about heading structure

Headings (the <h1> to <h6> tags) are the skeleton of a page. They show readers, Google and AIs how the content is organized, from the main title down to the subtopics. A clear title hierarchy improves reading, SEO and the odds of the page being cited in AI answers.

What heading structure is

Each page has a main title in the <h1> and subtitles in <h2>, <h3> and so on down to <h6>. The <h1> sums up what the whole page is about, the <h2> tags open the sections and the <h3> tags detail points inside each section. It works like the table of contents of a book.

Why hierarchy matters for SEO

  • Context for Google: headings tell the search engine the theme of each block and help it rank for the right terms.
  • Scannable reading: most people skim the titles before reading, and a good hierarchy keeps the reader engaged.
  • Snippets for AI: ChatGPT, Perplexity and Google's AI Overview use well marked sections to extract and cite answers.

Heading best practices

PracticeWhy it matters
A single H1 per pageDefines the central topic without ambiguity for search engines and readers
Hierarchy without skipsGoing from H2 to H4 confuses the structure; go H2, then H3, then H4
Descriptive headingsTitles with the keyword and the meaning of the section beat "Introduction"
No empty headingA title tag with no text says nothing and hurts accessibility

Headings and accessibility

Screen readers navigate through the list of headings to jump straight to the wanted section. When the hierarchy is clean and skip free, people using assistive technology find the content with ease. Here accessibility and SEO go hand in hand.

FAQ

Heading questions

Is the checker free?

Yes, free and no sign up. Paste the URL and get the heading structure and the problems instantly.

How many H1 should a page have?

Only one. The H1 represents the main topic of the page; multiple H1 tags make the central theme ambiguous for search engines and readers.

What is a level skip?

It is jumping from an H2 straight to an H4 without an H3 in between. The hierarchy should step down one level at a time to stay clear.

Do headings affect ranking?

Yes, indirectly. They give Google context about each section and improve the reading experience, which helps the page perform.

Can I repeat the same word across headings?

You can, naturally. Avoid repeating the exact title; prefer descriptive titles that set each section apart.

Is my data stored?

The check runs on demand and the page content is not stored.

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Glossary terms

Header tagA header tag, in the context of SEO and the web, is each HTML title tag from H1 to H6 that organizes the hierarchy of a page's content. The H1 names the main subject, while H2, H3 and the following levels open sections and subsections in order of importance. Used well, header tags make the text scannable for the reader and help Google understand the structure and topic of each page.H1The H1 tag is the main heading of a web page, the highest level heading in HTML, which signals to readers and to Google what the central topic of the content is. As a rule, each page has a single H1, shown prominently at the top, which sums up the page's promise and usually reflects the main keyword in a natural way.SubheadingsA subheading is a secondary heading, marked in HTML as H2 or H3, that splits content into scannable sections and subsections. While the H1 announces the general topic of the page, subheadings organize the internal blocks, guide reading and help both the user and Google understand the structure of the text. In on-page SEO, good subheadings improve readability and reinforce the relevance of each section.ScannabilityScannability is how easily a person can run their eyes over a piece of content and grasp the main ideas without reading every single word. A scannable text uses subheadings, lists, short paragraphs, bold and other visual cues that guide diagonal reading, the dominant pattern of people who read online. In practice, it is what makes the reader decide in a few seconds whether that page answers their question.