01
Look for conflicts
A page can declare a canonical in HTML and an HTTP Link header. Those values should agree.
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CANONICAL URL CHECK
Canonical tag checker
Find HTML and HTTP canonical declarations, spot conflicts, and check the declared target's response and noindex status.
HOW TO USE THE RESULT
Confirm that every canonical points to the intended page
Review every declaration, then open the target and make sure it is a working, indexable version of the content.
02
Check the target
The preferred address should return a successful response. Redirects and noindex instructions deserve review.
03
Compare page versions
Use the canonical for duplicate or closely similar pages. Keep internal links and sitemap entries aligned with the preferred URL.
CHECK MORE THAN ONE PAGE
Run the free site check
The site check crawls several pages and returns a prioritized list of technical and content findings.
What this check covers
- The checker reads canonical links from HTML and HTTP Link response headers.
- When one target is declared, the checker fetches it and reports status, redirects, and noindex instructions.
- The result cannot show the canonical selected by Google or another search engine.
- Addresses are normalized against the final page URL so relative canonical values can be reviewed.
Frequently asked questions
Does a canonical tag remove a page from search?
No. A canonical is a preference that helps search engines choose among similar pages. Crawlers can select a different canonical.
Should every page have a self-referencing canonical?
A self-referencing canonical is a common way to state the preferred address clearly. Sites with a deliberate canonical strategy may point some pages elsewhere.
What happens when HTML and HTTP canonicals differ?
Conflicting declarations make the preferred address unclear. Update the page or server header so both declarations agree.