Paste any page's HTML. We'll list the H1–H6 outline and flag skipped levels, missing H1s and empty headings.
Paste a page's HTML to see its heading structure, H1 to H6, as an outline. Spot missing H1s, skipped levels and headings that don't tell readers or search engines what each section is about.
01
The outline
Every heading in order and indented by level, so you see the page's structure at a glance.
02
Missing or multiple H1s
Whether the page has one clear main heading.
03
Skipped levels
Jumps such as an H2 followed directly by an H4, which confuse screen readers.
04
Empty or vague headings
Headings with no text, or labels so generic they don't describe the section.
- 1
Copy the page source
View the page source in your browser, or copy the HTML from your CMS.
- 2
Paste it in
The tool reads every heading and builds the outline instantly.
- 3
Fix the gaps
Add a missing H1, fill skipped levels and rewrite vague headings.
Clean hierarchy
One H1, H2s for main sections and H3s beneath them, with descriptive text throughout.
Skipped level
A level is missing, such as H2 to H4. Usually a styling choice; fix it with CSS instead.
No H1
There's no main heading, so readers and search engines get no clear signal of the page's topic.
Screen reader users jump between headings to find what they need, and search engines use them to understand how a page is organised. A clear outline makes content easier to scan for everyone, and is one of the simplest accessibility and SEO wins available.
About the heading outline reviewer.
HTML allows it, but one clear H1 describing the page is still the best practice for clarity and accessibility.