Website Canonical Checker
Audit canonical tags across a set of pages. Paste up to 20 URLs and the checker fetches them in parallel, reads the canonical from the HTML and from the HTTP Link header, and reports for each page whether the canonical is missing, self-referencing or points to another URL – and what is wrong: several canonical tags, HTML and header disagreeing, http instead of https, a canonical target that redirects or returns an error, or noindex combined with a canonical to another page.
- Encrypted connection
- No sign-up
- Free to use
How to use Website Canonical Checker
- Paste up to 20 URLs.
- Click “Check canonicals”.
- Read the result per page.
- Fix the pages with warnings.
Website Canonical Checker features
Bulk
20 pages in one go.
HTML and header
Both sources compared.
Target check
Redirects and errors.
Conflict detection
noindex, duplicates, http.
Safe fetching
Public addresses only, with size and time limits.
Redirects followed
Final URL shown.
When to use Website Canonical Checker
- Checking templates after a release.
- Auditing filtered or paginated URLs.
- Verifying a migration.
- Mobile vs desktop URL checks.
Website Canonical Checker FAQ
Should every page have a canonical?
A self-referencing canonical on every indexable page is a good default.
Why is noindex with a canonical a conflict?
noindex says “drop this page”, the canonical says “this page equals that one”; search engines may drop the target too.
Can the canonical be a redirect?
It should point to the final URL that answers 200.
How is this different from the URL Canonical Checker?
That tool explains one page in depth; this one checks many pages at once.
Does Google always follow the canonical tag?
It treats it as a strong hint. If other signals – redirects, internal links, sitemaps – point elsewhere, Google may choose a different canonical.
Should every page have a canonical tag?
It is good practice. A self-referencing canonical on every indexable page removes doubt when the same page is reachable through parameters or tracking links.
Can the canonical point to another domain?
Yes, for syndicated content that first appeared elsewhere. On your own site, a canonical to another domain is usually a mistake after a migration.
Canonicals across many pages
Template mistakes affect many pages at once: a canonical that always points to the home page, or one that keeps tracking parameters. Checking a sample of page types catches these quickly.
Keep internal links, sitemaps and canonicals pointing to the same URLs.
A canonical tag tells search engines which URL is the main version of a page. Checking up to 20 URLs in parallel shows, for each page, whether the canonical is missing, points to itself or points to another URL – and whether the HTML tag and the HTTP Link header disagree.
Typical problems are several canonical tags on one page, a canonical that points to a redirect or an error page, relative or http:// canonicals on an https site, and canonicals pointing to a different domain by mistake after a migration. Search engines may ignore a canonical that is contradictory.
Product pages with filters or tracking parameters should usually point to the clean URL. Pages that are genuinely different should have a self-referencing canonical.
Run the check on a sample of each page type – home page, category pages, articles, products, filtered listings – because canonical tags usually come from templates, and a template mistake affects every page built from it. After a migration, check that canonicals point to the new domain and use https.