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Free Canonical URL Checker for SEO

Paste a page URL to read its canonical tag, resolve it against redirects, and see whether it self-canonicalises correctly - no signup.

Technical SEO

Verify your canonical URL

Fetch a page and compare its canonical link tag to the final URL after redirects - catch missing, relative, or mismatched canonicals before they split equity.

We fetch the page HTML and read the <link rel="canonical"> tag, comparing it to the final URL after redirects.

How to use

How to use Canonical Check

  1. 1

    Paste a page URL

    Use the exact URL you care about ranking - including path and query if relevant.

  2. 2

    Compare tags

    We follow redirects, read the canonical link, and compare it to the final URL.

  3. 3

    Align everything

    Make canonical, sitemap, and internal links agree on one HTTPS host.

Guide

How to keep canonical tags clean

Every indexable page should have one self-referencing canonical that matches the HTTPS URL you want in Google.

Mismatches often appear after www/apex moves, trailing-slash changes, or CMS pagination bugs.

After fixing canonicals, re-check redirects and your sitemap so all three point at the same host.

Explore more on free ScrollLaunch tools, browse DR-ranked directories, or launch with a dofollow backlink.

Questions

Canonical Check FAQ

What is a canonical URL?

A canonical tag tells search engines which URL is the preferred version of a page when duplicates or near-duplicates exist (www vs non-www, trailing slash, UTM variants, etc.).

Should the canonical match the final URL?

Usually yes for indexable pages - a self-canonical that matches the final HTTPS URL after redirects keeps equity on one URL.

What if there is no canonical tag?

Search engines may guess. Add a self-referencing canonical, keep redirects clean, and list the preferred URL in your sitemap.

Does this tool execute JavaScript?

No. We parse the HTML response for a link rel=canonical in the document. Client-rendered tags may not appear.

Are private or localhost URLs supported?

No. Only public http(s) hosts are allowed.

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