Canonical Checker

Check whether a page has a correct canonical tag: one tag, an absolute URL, the right protocol and domain, and a target that is live, indexable and not canonicalised again.

How to use the Canonical Checker

  1. 1

    Enter the URL of the page you want to check.

  2. 2

    Click Check canonical.

  3. 3

    Fix any failed checks so Google indexes the URL you want.

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Frequently asked questions

What is a canonical tag?

A canonical tag (<link rel="canonical">) tells search engines which URL is the main version of a page, so duplicate or similar URLs do not compete with each other.

Should every page have a self-referencing canonical?

Yes. Unique pages should canonicalise to themselves. Only duplicates or filtered variations should point to another URL.

Can Google ignore my canonical?

Yes. Canonicals are hints. Google may ignore them if they point to redirects, noindex pages, or conflict with sitemaps and internal links.

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