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How to use Canonical URL Checker
Canonical URL Checker. Find and validate rel=canonical. Yes. A self-referencing canonical on each page prevents duplicates from URL parameters, tracking…
The short answer
To check a canonical URL, enter a page address. ClickZM fetches it, reads the rel=canonical link and HTTP Link header, and reports whether the canonical is present, absolute, self-referencing, reachable with a 200 status, and consistent with redirects.
A browser cannot make this check itself, so ClickZM's server does it, blocks private addresses, and does not store the lookup.
How to use it
Enter the website address, domain or IP you want to check.
Click the button to run the Canonical URL Checker.
Read the results; warnings and errors are highlighted with an explanation.
Fix any issue, then run the check again to confirm.
Limits worth knowing
Should every page have a canonical tag? Yes. A self-referencing canonical on each page prevents duplicates from URL parameters, tracking codes and http/https or www variations.
Is a canonical a directive? No. Google treats it as a strong hint and may pick a different canonical if signals disagree, for example if the canonical URL redirects.