See your page’s heading outline at a glance. This free heading structure analyzer extracts every H1 to H6 from your HTML or Markdown and flags common SEO issues — a missing H1, multiple H1s, or skipped heading levels that hurt accessibility and crawling.
How to use the heading analyzer
Paste your page’s HTML, or Markdown headings written with # symbols. The tool builds an indented outline showing the hierarchy and lists any problems it finds. A clean structure uses one H1, then nests H2s and H3s logically without skipping levels — which helps both search engines and screen readers understand your content.
Frequently asked questions
How many H1 tags should a page have?
Exactly one. The H1 is the page’s main title. Multiple H1s or no H1 can confuse search engines and assistive technology about the page’s primary topic.
Why do skipped heading levels matter?
Jumping from H2 to H4, for example, breaks the logical document outline. It can hurt accessibility for screen-reader users and makes your structure harder for search engines to interpret. Keep levels sequential.
Do headings affect SEO?
Yes, indirectly. Clear headings help search engines understand your content’s structure and topics, and they improve readability, which supports engagement and rankings.