canonical tag checker
Free Canonical Tag Checker
Check the canonical signals on any page, including HTML canonicals, header canonicals, and robots directives that affect indexation.
Built for canonical tag checker
Check whether the canonical signals are actually aligned
A canonical tag checker helps you verify whether a page points at the correct canonical URL and whether robots directives are quietly undermining indexation.
It is useful when you are cleaning up duplicate content, faceted URLs, campaign parameters, or any page type where canonical mistakes can spread quickly.
Common use cases
- Check HTML and header canonicals on important pages
- Review canonical mismatches after migrations or template updates
- Spot noindex and canonical conflicts before they scale
How to Use the Canonical Tag Checker
- 1Enter the page URL you want to inspect
- 2Run the checker to fetch both the HTML and response headers
- 3Compare the final fetched URL with the HTML canonical and any header canonical
- 4Review meta robots and X-Robots-Tag directives for indexation conflicts
- 5Fix any mismatch before the issue affects clusters of pages
Frequently Asked Questions
AI Search Guides
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The broader system behind modern AI search visibility across prompts, pages, and engines.
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