What is a canonical tag?

A canonical tag (rel=canonical) tells search engines which URL is the preferred version of a page, helping prevent duplicate content issues in SEO.

Why is checking canonical tags important?

Incorrect canonical tags can cause search engines to index the wrong page version, diluting your SEO rankings and causing indexing issues.

What issues does this tool detect?

The tool checks for missing canonical tags, self-referencing canonicals, cross-domain canonicals, HTTP/HTTPS mismatches, and trailing slash inconsistencies.

Should every page have a canonical tag?

Yes, it's best practice for every indexable page to have a canonical tag, even if it's self-referencing, to explicitly declare the preferred URL.

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About This Tool

Frequently Asked Questions

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