Heading Structure Checker
Turn HTML, Markdown, or a heading list into a clear outline and find hierarchy problems before publishing.
Enter Page Headings or Content
Paste HTML, Markdown, or a plain heading list. The tool reads heading structure only.
Heading Outline and Issues
Review the sequence, level, wording, and issue notes before publishing.
Use the example or paste your own content, then select Check Heading Structure.
How to Review a Heading Structure
Use the report as an editing checklist, then confirm the final page in its published layout.
Use a primary H1 that identifies the main subject or purpose of the page.
Organize major sections with H2 and use H3 or deeper levels only inside the relevant parent section.
Replace empty, repeated, or vague headings with labels that help readers scan and navigate the content.
Checks and Result Guidance
The checker evaluates structure and wording patterns. It does not judge whether the page is useful, accurate, or competitive.
Missing or multiple H1 headings and jumps such as H2 directly to H4 are reported as errors.
Repeated, empty, and unusually long heading text is identified for editorial review.
The pasted content and generated report are not submitted to or stored by this tool.
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Frequently Asked Questions
Understand supported formats, structural checks, limitations, and browser processing.
Which heading formats can I check?
You can check HTML headings, Markdown headings, or a plain list written as H1: Title, H2: Section, and so on. Auto Detect chooses a format from the content.
What heading problems does the tool identify?
It identifies missing or multiple H1 headings, skipped heading levels, empty headings, repeated heading text, and headings longer than the selected review threshold.
Does every page need exactly one H1?
A clear primary H1 is a practical default for most pages. Your publishing system and document type may have additional requirements, so review the final rendered page as well as this report.
Does a clean heading outline guarantee better rankings?
No. A clear outline helps people and systems understand content structure, but search performance also depends on usefulness, relevance, authority, technical quality, and many other factors.
Is the content I check uploaded or stored?
No. Parsing, checks, copying, and CSV preparation run in your browser. The tool does not submit or store the content you enter.
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