Heading Structure Checker
See the H1–H6 outline of any page and fix heading problems that confuse Google and screen readers — with a full on-page content report.
How to use the Heading Structure Checker
Enter a URL or paste HTML
Any public page or your own HTML code.
See the outline
Headings as an indented tree, in page order.
Fix the issues
Clear checks with tips for each problem.
Why use our Heading Structure Checker?
Heading tree
H1–H6 shown as a nested outline.
Issue checks
Missing/multiple H1, skipped levels, empty or long headings.
Keyword check
See if your keyword appears in the H1 and subheadings.
Content stats
Words, paragraphs, reading time and readability.
Image alt text
Finds images missing alt text.
Paste HTML
Check pages before they go live.
Frequently asked questions
Everything you need to know about the Heading Structure Checker.
Back to the toolWhy are headings important for SEO?
Headings tell Google and readers what each section is about. A clear H1–H6 structure helps pages rank and makes content easier to scan.
Can a page have more than one H1?
HTML allows it, but one clear H1 that matches the page topic is best practice for SEO and accessibility.
What is a skipped heading level?
Jumping from H2 straight to H4 (without H3). It breaks the document outline for screen readers.
How long should a heading be?
Keep H1s under about 70 characters and subheadings short and descriptive.
Can I check a page that is not live?
Yes. Switch to “Paste HTML” and paste your page source.
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