Canonical Tag Checker

Validate canonical tags against page URLs locally

Developer ToolsLaunched Oct 3, 2026

What is Canonical Tag Checker?

Canonical Tag Checker inspects pasted HTML for canonical link tags and compares the declared canonical with a page URL locally. Spot missing, duplicate, malformed, or mismatched canonicals without sending private HTML anywhere. It is a focused, transparent SEO check that runs in your browser and requires no account.

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