SEO Tool
Canonical URL Checker
Check if a page correctly identifies its preferred version using the rel=canonical tag. Ensure search engines don't penalize you for duplicate content across different URLs.
How to use the Canonical URL Checker
A canonical tag tells search engines which URL is the real version of a page when duplicates exist — get it wrong and Google may rank the wrong page or none at all. This checker reads a page’s canonical tag and confirms it points to a valid URL that matches the page’s final address.
- 1Enter the page URL you want to check.
- 2The tool reads the rel=canonical tag and follows redirects.
- 3Confirm the canonical points to a reachable, matching URL.
- 4Correct any mismatch so ranking signals aren’t split.
Frequently asked questions
What is a canonical URL?
A canonical URL (rel="canonical") tells search engines which version of a page is the master copy when similar or duplicate content exists at multiple URLs. It consolidates ranking signals onto one preferred URL.
What does this checker do?
It fetches a page, reads its canonical tag, and checks whether the canonical points to a valid, reachable URL that matches the page’s final address after redirects — catching mismatches that cause duplicate-content issues.
Why does a wrong canonical hurt SEO?
If your canonical points to the wrong URL, search engines may index or rank a different page than you intended, or drop the page entirely. Consistent, correct canonicals prevent split or lost ranking signals.
Is this tool free?
Yes, the canonical URL checker is completely free with no signup.