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Heading Structure Checker.

HTML, text, URLs and results remain in this browser. Extract H1–H6 hierarchy and flag missing, duplicate or skipped levels. Uses passive local parsing and independent verification.

Use Heading Structure Checker

Private in this browser. Pasted data stays in this browser; the tool does not request remote sites.

Tool options
Preparing the local tool…

How it works

  1. 01

    Paste data and choose the explicit rules.

  2. 02

    Run the bounded local analysis.

  3. 03

    Review limitations before downloading the verified result.

Frequently asked questions

Does the tool validate a live site?

No. It analyzes only pasted data and does not promise search-engine behavior.

Does Heading Structure Checker upload my data?

Heading Structure Checker runs locally in your browser. Pasted data stays in this browser; the tool does not request remote sites.

What output does Heading Structure Checker create?

Heading Structure Checker creates Json output after the result passes its local verification checks.

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