Enter any page URL and our header tags checker extracts every <h1> through <h6> tag, counts each level, and flags heading hierarchy issues — so your SEO headings are clean.
What are header tags?
Header tags (or heading tags) are the HTML elements <h1>–<h6> that organize a page into a hierarchy. The H1 is the main heading; H2–H6 are nested subheadings. This header tags checker shows the full structure so you can see exactly how your h1 h2 h3 tags are arranged.
Why SEO headings matter
SEO headings give search engines and screen readers the outline of your content. A clear H1 plus a logical H2/H3 hierarchy improves relevance, readability and accessibility. Well-structured SEO header tags make it obvious what each section is about — which helps the page rank for the right terms.
Check your header tags and hierarchy
Paste a URL and this heading tags checkerextracts every H1–H6 in document order, with per-level counts, then flags problems like a missing H1, multiple H1s, or skipped levels (for example jumping from H2 straight to H4). It's the quickest way to check header tags across a page.
Header tag best practices
Use exactly one descriptive H1 as the page's main heading.
Nest H2–H6 logically and never skip a level for styling reasons.
Make headings descriptive and keyword-relevant, not generic.
Use CSS — not heading tags — to control text size.
How to use the header tags checker
Paste a page URL into the header tags checker above.
Click “Check” — we fetch the live page and read every H1–H6.
Review the per-level counts and the full heading outline.
Header tags (also called heading tags) are the HTML elements <h1> through <h6> that structure a page's content into a hierarchy. The H1 is the main heading; H2–H6 are nested subheadings. Together they form the outline search engines and screen readers use to understand your content.
A header tags checker is a free tool that fetches any page, extracts every H1–H6 tag in document order, counts each level, and flags hierarchy issues like skipped levels or multiple H1s. It's the fastest way to audit your SEO headings and header tags on any page.
SEO headings give search engines the structure and topic of your content. A clear H1 and a logical H2/H3 hierarchy improve relevance, readability, and accessibility — all of which support rankings. Poor heading structure (no H1, multiple H1s, skipped levels) makes content harder to understand.
Use exactly one H1 as the page's main heading, then as many H2–H6 as the content needs, nested logically. Don't skip levels (e.g. H2 straight to H4), and don't use headings purely for styling — that's what CSS is for.
The H1 Checker focuses on the H1 (and the H1/H2/H3 outline) against the 'one descriptive H1' rule. This header tags checker shows the full H1–H6 structure with per-level counts and hierarchy warnings — use it when you want to audit all your SEO header tags, not just the H1.
Completely free and online, with no account required. It's part of WebsiteAuditTools' free suite of on-page SEO checkers.