Heading Structure Checker
Check H1 and heading hierarchyRuns locally · nothing uploaded
Also works as:h1 checkerheading tags checkerhtml outline
How to use
- 1Press Ctrl+U in your browser and copy the source.
- 2Paste it here.
- 3Review the outline and checks.
FAQ
Can a page have several H1s?
HTML allows it, but one H1 describing the page topic is clearest for SEO and accessibility.
Why do skipped levels matter?
Jumping from H2 to H4 muddles the structure, especially for screen reader users.