What is a canonical URL?
A canonical link element can indicate the preferred URL for substantially similar or duplicate content. It is a signal, not an absolute command, and should normally be consistent with the site architecture, redirects and internal links.
How to use the Canonical URL Checker
- Enter the URL, text or details requested by the tool.
- Run the check or generator.
- Review the result and apply changes only after checking them against your site and content.
SEO guidance
Use this tool as one part of an SEO workflow. Automated checks are useful for finding implementation problems quickly, but they do not replace manual review of search intent, content quality, crawlability, internal linking and the overall site architecture.
Frequently asked questions
Is this tool free?
Yes. The standalone checker page is available without an API key.
Can I check any website?
The tool is designed for publicly accessible HTTP or HTTPS pages. Private, local and reserved network addresses are blocked.
Does the result guarantee Google rankings?
No. These checks identify implementation issues and provide practical diagnostics; search rankings depend on many factors.
What does the score mean?
It is a weighted diagnostic score based on the checks included in this version. It is not a Google score.