Heading Structure Checker

Extract and analyze H1-H6 tags from HTML to check SEO heading hierarchy.

Paste the raw HTML of your webpage. This tool securely parses the HTML structure locally and extracts the exact heading hierarchy (H1-H6) to check for missing levels or missing H1s.

HTML Source

Heading Hierarchy

Hierarchy will appear here...

Select your image or file to begin

Drag and drop files here, or click to choose from your computer or phone.

Choose File

Supports JPG, PNG, WEBP, GIF, PDF (Max 25MB). No account needed.

Instant browser processing

100% private, files stay safe

Zero watermark & unlimited use

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Frequently Asked Questions

Is the Heading Structure Checker tool free to use?

Yes, the Heading Structure Checker tool provided by SizeSnap is 100% free to use. There are no hidden fees, premium subscriptions, or watermarks.

Are my files safe when using Heading Structure Checker?

Absolutely. SizeSnap prioritizes your privacy. All processing for the Heading Structure Checker tool happens directly in your browser. Your files are never uploaded to our servers.