Heading Structure Checker
Paste any HTML and instantly see every heading (h1 through h6) extracted and displayed as an indented hierarchy. The tool flags common structural issues: missing h1 tags, multiple h1 tags on the same page, skipped heading levels (jumping from h1 to h3 without an h2), and empty headings.
Proper heading structure is important for both accessibility and SEO. Screen readers use headings to build a navigable outline of the page, and search engines use them to understand content hierarchy. This tool helps you catch structural problems before they reach production.
Paste a full HTML document, a page fragment, or just a series of heading tags — the parser extracts headings from whatever you provide. Everything runs in your browser using the native DOMParser API.
By The Paper Room Editorial Team — Developer Tools
Frequently asked questions
What heading issues does it detect?▼
The tool flags four types of issues: no h1 tag found, multiple h1 tags on the same page, skipped heading levels (e.g., h2 followed by h4 with no h3 in between), and empty headings (heading tags with no text content).
Why does heading order matter?▼
Screen readers use headings to build a navigable page outline. Skipping levels (e.g., going from h1 to h3) breaks this outline and confuses assistive technology users. Search engines also use heading hierarchy to understand content structure and relevance.
Do I need to paste a full HTML document?▼
No. You can paste a full document, a fragment, or just a series of heading tags. The parser extracts all h1–h6 elements from whatever HTML you provide.
Does it check heading content quality?▼
The tool checks structure only — tag nesting, level sequence, and presence. It does not evaluate whether the heading text is descriptive, keyword-rich, or appropriately concise. That is an editorial judgment the tool leaves to you.