ValidateThis

Canonical URL checker

Related tools

Validators and utilities that complement Canonical URL checker — same session, no sign-up.

Load HTML

Paste HTML or fetch a public URL to inspect the <head>.

Detect the canonical link element in the document head.

Canonical link

Surfaces the first <link rel="canonical" href="…"> if present. Use with hreflang and meta tools for full URL signals.

How to use this tool

  1. Paste your sample in the input (or fetch from URL if this tool supports it).
  2. Run the main action on the page to execute Canonical URL checker.
  3. Read the result, fix the source data or config, and re-run if needed.

What this check helps you catch

  • Detect the canonical link element in the document head.
  • Limits called out in the description (what this tool does not verify — e.g. live network reachability, issuer databases, or strict schema contracts unless stated).
  • Structural or syntax mistakes that would break parsers, serializers, or the next step in your workflow.

FAQ

What does Canonical URL checker do?
Detect the canonical link element in the document head. Use the form above, then see “How to use” and “What this check helps you catch” for behavior detail.
Is this a substitute for server-side validation?
No. Use it for manual checks and triage; production systems should still validate and authorize on the server.
Where does processing happen?
Most validators here run in your browser. If a tool calls an API, that is stated on the page. See the site privacy policy for data handling.