Template QA
Confirm that a page template emits one deliberate canonical after deployment.
Crawling and indexing tool
Canonical Tag Checker
Enter a public page URL to check its declared canonical against the final URL after redirects. Review the evidence before changing an intentional canonical.
FreeNo loginNo data stored
Migration review
Compare redirected URLs with the canonical on the final destination.
Syndication check
Inspect a cross-domain canonical before deciding whether it is intentional.
What it checks
Use the result as evidence, not a score.
- Requested and final URL after bounded redirects
- Every canonical link found in the final HTML
- Resolved canonical URL and its relationship to the final page
- Final HTTP response
What it cannot check
- Google’s selected canonical for the page
- Whether consolidation is intentional without business context
- Canonical consistency across the whole website
How it works
Input, inspect, improve, verify.
The tool processes what you enter, shows a plain-language result, and gives you a safer next step. Make the change on your website, deploy it, then test the live page again.
Understand the result
How to use the canonical URL checker
Paste the complete public page address into Public page URL and select Check canonical. The tool follows a bounded redirect path, fetches the final HTML, and reports the requested URL, final URL, declared canonical, relationship, element count, and HTTP response.
Use View example to check the Overhyped homepage. A single self-referencing canonical should match the final page URL. This canonical checker inspects the fetched HTML; it does not run the page’s JavaScript or reveal Google’s selected canonical.
- Check one public HTTP or HTTPS URL at a time.
- Compare the canonical with the final destination rather than only the URL you entered.
- Private networks and non-standard ports are blocked. An unavailable fetch is not proof that the page has no canonical.
Understand the result
Read the canonical link check before applying a fix
Self means the resolved canonical matches the final page URL. Same site alternate means it points to another URL on the same origin, while cross domain means another origin. These relationships identify what to review; they cannot establish whether consolidation is intentional.
For example, if a redirected page ends at /about and declares /about as its canonical on the same origin, the relationship is self. If it declares another path, review the intended preferred page before changing the template. The relationship uses the first detected value; the element count helps identify competing declarations.
- More than one declaration needs source review, even if the first looks correct.
- The canonical destination is not separately fetched by this check.
- Use Search Console URL Inspection for Google-selected canonical evidence.
Understand the result
A canonical identifies the preferred URL among equivalent pages.
A rel=canonical link is a strong hint about which URL should represent duplicate or substantially similar content. It does not force Google to select that URL, and a missing canonical is not automatically an error when the page has no meaningful alternate versions.
A self-referencing canonical is a useful default for many indexable templates because it states the preferred version explicitly. Filtered category pages can create many duplicate URL paths, so their canonical and crawl strategy should be reviewed together instead of treating the tag as a way to manage crawl budget.
- Use one canonical declaration in the final HTML.
- Prefer an absolute public URL so its origin and path are unambiguous.
- Do not add canonicals mechanically to intentionally separate pages.
Understand the result
The canonical should agree with the rest of the URL system.
Compare the canonical with the final URL after redirects. Internal links, XML sitemaps, redirects, hreflang, and visible navigation should normally reinforce the same preferred URL instead of sending mixed signals.
A redirect moves people and crawlers to another location. A canonical lets equivalent pages remain accessible while suggesting which one should be indexed. They solve different problems and should not be swapped without reviewing the intended visitor journey.
- Remove competing canonicals created by templates, plugins, or client scripts.
- Review cross-domain canonicals as publishing agreements, not generic errors.
- Keep established public URLs working when consolidating duplicates.
Understand the result
Declared canonical and Google-selected canonical are different evidence.
This checker can report only the canonical declared in the fetched HTML and its relationship to the final response URL. It cannot show which canonical Google selected after considering redirects, links, sitemaps, content similarity, and other signals.
Use URL Inspection in a verified Search Console property to compare the user-declared and Google-selected canonicals. After a correction, deploy it, confirm the final source, inspect representative URLs, and then allow time for recrawling.
- Do not claim consolidation from the declaration alone.
- Investigate a mismatch before changing a working URL.
- Verify groups of template-generated pages, not only one example.
Popular use cases
Useful before and after publishing.
Template QA
Confirm that a page template emits one deliberate canonical after deployment.
Migration review
Compare redirected URLs with the canonical on the final destination.
Syndication check
Inspect a cross-domain canonical before deciding whether it is intentional.
Pro tips
Small checks that prevent avoidable mistakes.
- Use absolute canonical URLs and keep exactly one declaration in the final HTML.
- Compare the canonical with the final URL after redirects, not only the address you entered.
- Do not remove a cross-domain canonical until the publishing or syndication intent is confirmed.
- Use Search Console for Google-selected canonical evidence on a verified property.
Common issues and solutions
What to review when the result looks wrong.
No canonical is found
This can be acceptable when the page has no equivalent URL. Review the wider URL pattern before adding one.
Several canonicals appear
Check templates, plugins, and JavaScript for competing declarations, then keep one intentional value.
Canonical and final URL differ
Confirm whether this is deliberate consolidation, a migration remnant, or an incorrect template value.
Frequently asked questions
Short answers before you make a change.
Can I check a canonical URL online without logging in?
Yes. Enter one public HTTP or HTTPS page URL. The checker fetches the final HTML after bounded redirects; private networks and non-standard ports are not supported.
Does the canonical link checker test the target URL too?
No. It extracts and resolves canonical values from the fetched page and compares the first with the final page URL. Check the canonical destination separately if you need its HTTP response.
Can it detect duplicate or JavaScript-generated canonicals?
It counts canonical links detected in the fetched HTML, but does not run page JavaScript. Compare rendered HTML separately when a script changes the head.
Does a canonical force Google to use that URL?
No. A canonical is a strong hint. Google can select another URL when other signals conflict.
Is a missing canonical always an SEO problem?
No. It depends on whether equivalent URL versions can exist and how the site manages them.
Can this show Google’s selected canonical?
No. That requires Google Search Console access for a verified property.
Read the practical guide
How to check a canonical URL without guessing
Understand the evidence behind this tool, where its result stops, and the safer next steps to verify on a live page.
Read the guideEvidence · Limitations · Verification