Free SEO Tools
Canonical Checker
Enter a URL to see its canonical tag and whether it's missing, duplicated, relative, or points at another domain — fetched live, free, no signup required.
What this checks
This tool fetches the page and reads every <link rel="canonical"> tag, comparing it against the URL you requested. Not every difference is a mistake — some sites deliberately canonicalize to a different path or domain, so these are shown as review flags, not hard failures.