Can this checker read any website directly?

Direct browser requests can be blocked by CORS on many sites. This tool supports direct checks when allowed and includes a raw HTML mode so you can paste page source when direct fetch is restricted.

What should I do if the canonical URL is different from the final URL?

Review whether the canonical target is intentional. In many cases, the canonical URL should match the preferred indexable URL after redirects.

Home› Tools› Canonical Tag Checker

SEO Tool • Privacy-First • Browser-Based

Canonical Tag Checker

Check a page’s canonical setup fast. Inspect the final URL, rel=canonical value, HTTP status, redirect chain, and common SEO issues. This tool works best with CORS-friendly URLs and also supports raw HTML paste for sites that block direct browser fetching.

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Check canonical setup

Enter a page URL for a direct check, or paste raw HTML if the site blocks browser fetches with CORS.

Page URL

Raw HTML (fallback mode)

Base URL for pasted HTML

Use raw HTML mode when the site blocks browser fetches. If you paste HTML, the tool can still read the canonical tag and resolve relative canonicals against the base URL.

Ready

Details

Canonical Tag Found

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Meta Robots

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Notes

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Redirect Chain

#	URL	Status	Type
—	No data yet	—	—

Browser fetches do not always expose the full redirect chain. This tool shows what it can determine from the final response and your pasted HTML.

Why canonical matters

Canonical tags help search engines understand which version of a page should be treated as the preferred version when duplicate or similar URLs exist. A clean canonical setup can reduce duplicate-content confusion and help consolidate ranking signals.

In many cases, the canonical URL should match the final preferred indexable URL after redirects. Differences can be valid, but they should be intentional.

Frequently Asked Questions

What does a canonical tag checker do?

A canonical tag checker helps you verify a page’s rel=canonical tag, compare it with the final crawled URL, and spot canonical mismatches or redirect issues.

Why is canonical important for SEO?

Canonical tags help search engines understand which version of a page should be treated as the preferred version when duplicate or similar pages exist.

Why can direct checks fail?

Many websites block browser fetches with CORS rules. If that happens, use the raw HTML mode by pasting the page source and base URL.

Should the canonical URL match the final URL?

Often yes. In many clean setups, the canonical URL matches the final preferred URL after redirects. Differences can be valid, but they should be intentional.