Canonical URL Checker
Identify canonical URLs instantly and fix duplicate-content issues that hurt SEO performance and indexing.
What is a canonical URL?
A canonical URL is the version of a page a site owner wants search engines to treat as the "master" copy. It matters whenever the same content is reachable through more than one address — with or without www, a trailing slash, or tracking parameters — so search engines consolidate ranking signals onto one URL instead of splitting them across duplicates.
Common canonical mistakes
- • Missing canonical tags entirely
- • Canonical pointing to the wrong page
- • Multiple canonical tags on one page
- • Canonicalizing to a non-indexable page
Best practices
- • Use absolute, correct URLs
- • Prefer self-referencing canonicals
- • Avoid canonical loops
- • Keep canonical URLs aligned with your sitemap
FAQs
What happens if I don't use canonical tags?
Search engines may treat duplicate pages as separate, hurting your rankings.
Can I have multiple canonical tags?
No — that confuses search engines and signals may be ignored entirely.
Does Google always follow canonical tags?
No, it treats them as a strong hint, not a command.