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Canonical Tag Test

the <link rel="canonical"> tag

What is it?

The "Canonical Tag Test" tool from TeckBlaze analyzes the <link rel="canonical"> tag in real time. You enter a URL above, we fetch the page exactly as Googlebot would, isolate the tested element, compare it to 2026 best practices, and tell you in plain words whether it passes, needs work, or is critical.

Why canonical tag test still matters in 2026

Incorrect indexing configuration can wipe your site off Google results overnight — often without a clear warning in Search Console.

The newer reason: AI answer engines and link previews

If Google can't index the page, no AI can find it via the searches it runs. That's the double penalty of bad indexing in the AI Overviews era.

Common mistakes worth checking

How do I fix it?

Fixing the <link rel="canonical"> tag usually takes minutes once you know where to look. Below: the code example, where to edit it based on your stack, the usual causes, and the best practices that keep the issue away.

Example

HTML

<link rel="canonical" href="https://votre-site.com/page-officielle">

Where to make the change

Common causes and resolution

Best practices

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