Free canonical tag checker
Enter a page address. We read its canonical tag and flag setups that can split your rankings.
Free. No signup. Takes about 10 seconds.
Questions
- What is a canonical tag?
- A line in a page's head that names the preferred address for that content. It tells search engines which version to show when the same page is reachable at several addresses.
- Should every page point to itself?
- Usually yes. A self-referencing canonical is a safe default. Point to a different page only when this page is a true duplicate.
- Is a canonical a command?
- No. It is a strong hint. Search engines may choose a different address if other signals disagree.
- Why does canonical plus noindex cause trouble?
- Noindex says do not show this page, while a canonical to another page says show that one instead. Mixed signals can lead to unexpected results.