Free Heading Tag Checker
Enter any public URL to inspect its H1 through H6 heading structure instantly. The tool fetches the page server-side, extracts every heading tag in document order, and checks for common issues including missing H1s, duplicate H1s, skipped heading levels, empty tags, and poor H1 length. Results include a full visual map of the heading hierarchy and a plain-language issue list with color-coded severity.
Frequently Asked Questions
What does the Heading Tag Checker analyze?
The tool extracts every H1, H2, H3, H4, H5, and H6 tag from the raw HTML of the page you enter. It shows the count of each heading level, the full text of each heading in document order, and a list of issues including missing H1s, duplicate H1s, level skips, empty tags, and H1 length problems.
Is the tool free?
Yes. There are no usage limits, no account required, and no cost.
Does the tool work on any website?
It works on any publicly accessible page. It cannot analyze pages behind a login, paywall, or IP restriction. It also cannot analyze content that is loaded by JavaScript after the initial page load, since it reads the raw HTML returned by the server.
Why does the tool show a missing H1 when I can see one on my page?
If the H1 is added to the page by JavaScript after the initial HTML loads, the tool will not detect it. The tool reads the raw server-side HTML, the same way a search engine crawler sees the page on its first visit before JavaScript runs. If your H1 is rendered client-side, you may want to consider server-side rendering or static generation for your heading structure.
What is a heading level skip?
A heading level skip occurs when the heading level increases by more than one step between consecutive headings. For example, if an H2 is immediately followed by an H4 with no H3 in between, that is a skip from H2 to H4. This breaks the semantic outline of the page.
How many H2 headings should a page have
There is no fixed number. Use as many H2 headings as your content requires to introduce distinct major sections. A 500-word page might need two or three H2 headings. A long-form guide might use ten or more. The number matters less than whether each H2 genuinely introduces a distinct section of content.
Can a page have too many headings overall?
Technically no, but practically yes. If a page has dozens of heading tags where paragraphs or lists would be more appropriate, the heading structure loses meaning. Use headings to mark genuine structural sections, not every sentence or short phrase that might benefit from visual emphasis.
Does heading structure directly affect rankings?
Yes, though it is one signal among many. The H1 is widely regarded as the most important on-page element for communicating topic relevance to search engines. H2 and H3 headings help search engines understand the subtopics covered on the page. A well-structured heading hierarchy also improves time-on-page metrics by making content easier to scan, which can indirectly support rankings.
What is the ideal H1 length?
Most SEO practitioners recommend keeping the H1 between 20 and 70 characters. Shorter than that and it may not clearly convey the page topic. Longer than that and it risks being truncated in some display contexts. The tool flags H1s under 10 characters as very short and H1s over 70 characters as long.