What is a canonical tag?
A canonical link element tells search engines which URL is the preferred version of a page when multiple URL variants represent similar content.
How to check a canonical tag
Paste the HTML of the page, especially its head section. The checker finds canonical link elements and reports the URL values.
Canonical SEO best practices
Use one clear canonical URL where appropriate, keep it consistent with your preferred URL, avoid pointing canonicals to irrelevant pages and make sure important pages are not canonicalized away by mistake.
FAQ
Does this fetch a live page?
No. It analyzes pasted HTML, so it works without an API.
No. It analyzes pasted HTML, so it works without an API.
Can a page have multiple canonical tags?
It can contain them, but multiple conflicting canonicals create an issue worth fixing.
It can contain them, but multiple conflicting canonicals create an issue worth fixing.