Canonical URL checker
Paste a page's address to see its canonical tag, og:url, robots noindex setting and redirect chain, each with a plain-English explanation. Free, no sign-in, nothing stored beyond the request.
Frequently asked questions
- What does this tool check?
- It fetches the page you give it and reads its link rel=canonical tag, its og:url meta tag, whether its robots meta tag includes noindex, and how many redirects it took to get there. Nothing is stored beyond the request.
- Why does a self-referencing canonical matter?
- A canonical tag that points back at the same page tells search engines this is the one true version, which is the safe default for a page that is not a duplicate of anything else.
- Why would a canonical point to a different domain?
- That is expected on a cross-post: a copy published to another platform should carry a canonical pointing back at the original on your own site. On your own site's page it usually means something is set up wrong.
- Is this free tool related to scatterpost?
- Yes. scatterpost publishes to your own site first and sends every cross-post with that page's canonical URL already set, so this check always passes for anything it publishes.