Canonical tag checker

What is Canonical tag checker?

Canonical tag checker finds the canonical link declared in a webpage's HTML. The value identifies the preferred URL published by the page, which is useful when reviewing duplicate routes, tracking parameters, or domain changes. The check focuses on the declaration rather than a search engine's final decision.

How to use this tool

Enter the exact page URL and submit the checker. Read the reported canonical value and compare it with the page you intend visitors and search engines to use. Check important alternate URL versions separately if a migration or template change may have affected their declarations.

Understanding the results

The tool reports the first canonical link it finds. It does not prove that the destination loads, that other duplicate pages agree, or that a search engine selected the same canonical. A missing value requires a review of the page's intended publishing setup, while an unexpected value can indicate an outdated template or environment setting. Verify the destination before changing a declaration.

Frequently asked questions

Can this detect every conflicting canonical?

No. The summary returns the first matching declaration. Inspect the source directly if you suspect multiple canonical elements or other conflicting signals.

Does finding a canonical guarantee that duplicates disappear?

No. The declaration is one signal. Consistent internal links, redirects, sitemap URLs, and accessible destination content also matter when reviewing a preferred page version.

Continue your review

For a more complete picture, combine these findings with URL redirect checker, Sitemap checker, and Noindex checker.