SEO validation

Canonical Tag Checker

Paste HTML, find rel canonical tags, validate the href, and compare it with the page URL you expect search engines to index.

Score

100

Clean canonical signal

HTML and expected canonical URL

Paste the page source or the head section. Add the page URL to resolve relative canonical values.

Page URLExpected canonical URL

HTML source

How it works

Result

Canonical summary

Clean

Found canonical

https://mtkits.com/canonical-tag-checker

Expected canonical

https://mtkits.com/canonical-tag-checker

Findings

Single canonical tag found

pass

The page declares one canonical tag, which is the expected count for most pages.

Canonical 1 URL is valid

pass

https://mtkits.com/canonical-tag-checker

Canonical matches expected URL

pass

The canonical URL matches the expected page URL after normalization.

Suggested canonical tag

Use this when the page should point to the expected canonical URL.

<link rel="canonical" href="https://mtkits.com/canonical-tag-checker" />

GuideHow it works3 steps

Paste the page HTML

Copy the rendered page source or head markup and paste it into the checker workspace.

Add the expected URL

Enter the final public URL that should be declared as the canonical version of the page.

Review SEO issues

Check for missing, duplicate, relative, invalid, or mismatched canonical tag values.

More toolsRelated tools

SEO Checker

Run a broader on-page audit for titles, descriptions, canonicals, headings, and crawl signals.

HTTP Observatory

Review website headers, HTTPS delivery, and browser security policies.

Canonical Tag Checker Guide

Learn what canonical tags mean and how this checker helps spot SEO issues.

FAQFrequently asked questions

What does a canonical tag checker do?

It inspects HTML for rel canonical link tags and checks whether the canonical URL is present, valid, unique, and aligned with the expected page URL.

Should canonical URLs be absolute?

Absolute URLs are safer because they remove ambiguity for crawlers and make the intended canonical page clear across templates, feeds, and copied markup.

Is one canonical tag enough?

Yes. A page should normally declare one canonical URL. Multiple canonical tags create mixed signals and should be cleaned up.

Does this tool fetch my website?

No. This checker works with pasted HTML in your browser. It does not crawl or request the live page.

ShareShare this tool

Back to MTKits