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7-Point Canonical Audit

Canonical Tag Checker

Detect canonical loops, broken targets, cross-domain canonicals, multiple tags, and conflicting signals — all in one check.

🏷️ Declared Canonical🔁 Self-Referencing💀 Canonical → 404🔄 Canonical Loop🌍 Cross-Domain Canonical📋 Multiple Canonicals⚡ HTTP vs Meta Conflict

💡 Fetches the page, the canonical target, and robots.txt simultaneously

Tool created by iNet Ventures

Canonical Chaos: The 7 Issues This Tool Catches

🏷️Missing Canonical

If no canonical is declared, Google has to guess which URL is the master version. Tracking parameters, trailing slashes, and HTTP/HTTPS variations can all create unintended duplicates. Always declare a self-referencing canonical.

🔁Non-Self-Referencing

When a canonical points to a different URL, Google treats the current page as a duplicate of the target. This is intentional for consolidating paginated content or duplicates — but accidental non-self canonicals during site builds are a common issue.

💀Canonical → 404

If the canonical target URL returns a 404 error, Google cannot follow it. The directive is broken. Google will ignore it and make its own indexing decision — often picking the wrong version of the page.

🔄Canonical Loop

Page A → canonical → Page B → canonical → Page A. Google detects the loop, ignores both canonicals, and chooses which version to index independently. This is one of the hardest canonical bugs to spot without a tool like this.

🌍Cross-Domain Canonical

Pointing to a URL on a completely different domain tells Google to index the other domain's page instead. This is correct for syndicated content — but if it's accidental (e.g. from a staging-to-production migration gone wrong), it can catastrophically deindex your pages.

📋Multiple Canonical Tags

Having two or more canonical tags on the same page is almost always caused by conflicting plugins, themes, or CMSs. Google uses the first tag and ignores the rest — which may not be the one you intended.

⚡HTTP vs Meta Conflict

A server can declare a canonical via the HTTP Link header, and the page HTML can declare a different canonical via the meta tag. When they conflict, Google gets confused and may ignore both. Ensure your server and CMS are not setting conflicting canonicals.

Complete Your Technical SEO Audit

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Meta Tag Preview

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Technical SEO Sorted — Now Build Links

Once your technical foundation is solid, high-quality backlinks are the next biggest ranking lever. Our blogger outreach team builds real, editorial dofollow links.

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Frequently Asked Questions

Everything you need to know about canonical tags and duplicate content