Step 1
Enter a page URL
We fetch the final page using the shared page-audit engine used by Meta Tag Checker.
Free SEO Tool
Canonical Tag Checker
Confirm whether a page declares a canonical URL, if it is self-referencing, and whether it matches the final URL after redirects.
Enter a public URL to validate whether a canonical tag exists and whether it matches the final page URL.
How It Works
Step 2
Extract the canonical tag
The tool reads the link rel=canonical value and normalizes it against the final URL.
Step 3
Review mismatches
See whether the canonical exists, is self-referencing, and matches the final destination.
Use Cases
Duplicate content control
Check parameterized or mirrored URLs point to the preferred canonical page.
CMS template audits
Catch missing or incorrect canonical tags after theme or template updates.
Cross-domain consolidation
Verify intentional cross-domain canonical targets during brand or domain changes.
Frequently Asked Questions
Does this reuse the Meta Tag Checker engine?
Yes. Canonical Tag Checker uses the same server-side page-audit engine for fetching and HTML extraction.
What does self-referencing mean?
Self-referencing means the canonical URL matches the final fetched page URL after redirects.
Can JavaScript-only canonical tags be detected?
Only tags present in the fetched HTML response are detected. Client-only injected tags may be missed.
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