Free Canonical Tag Checker
Verify canonical tags, detect duplicate content issues, and check redirect chains in real-time — as Googlebot sees them. Free, no signup required.
Enter a URL to check
Verify your canonical tag setup and detect common duplicate content issues.
Why Canonical Tags Matter
Duplicate content can split your ranking power across multiple URLs. Without a canonical tag, Google decides which version to index — and it often picks the wrong one, diluting your authority and hurting your positions.
Duplicate Prevention
Canonical tags consolidate ranking signals to your preferred URL, ensuring Google indexes the right page and directs link equity correctly.
Issue Detection
Misconfigured canonicals after CMS migrations, parameter-driven URLs, or redirect chains are common but invisible — this tool surfaces them instantly.
- A canonical pointing to a 404 page signals conflicting content ownership to Google
- E-commerce filter URLs without canonicals can generate hundreds of duplicate pages
- Redirect chains that break canonical alignment are a top technical SEO issue
How to Use
Four steps from URL to full canonical analysis in seconds.
Enter URL
Paste the full page URL to check, including https://.
Fetch & Analyze
We fetch the page as Googlebot and extract the canonical tag and related meta.
Review Status
See if canonical is self-referencing, pointing elsewhere, or missing.
Fix Issues
Follow the recommendations to resolve any problems found.
Use Cases
Canonical issues appear in every type of site — here's where this tool is most valuable.
E-commerce
Ensure product variants and filter URLs do not create duplicate content that splits your ranking power.
Multi-language Sites
Verify hreflang and canonical alignment so language variants do not compete against each other.
Site Migrations
Check canonical tags survived the URL change. Broken canonicals after migrations quietly kill rankings.
CMS Platforms
Detect auto-generated canonical issues in WordPress, Shopify, and other platforms.
What People Are Saying
Real feedback from SEO specialists, developers, and e-commerce managers.
Found 200+ pages with canonicals pointing to the wrong URL after our Shopify migration. This tool saved our rankings.
The redirect detection is key. We had a chain redirect that made the canonical point to a 404. Caught it instantly.
Simple, fast, and shows exactly what Googlebot sees. No more guessing about canonical configuration.
Frequently Asked Questions
What is a canonical tag?
A canonical tag (<link rel="canonical">) tells search engines which URL is the "official" version of a page. It prevents duplicate content issues when multiple URLs serve similar or identical content.
What does "Points Elsewhere" mean?
It means the canonical tag on this page points to a different URL. This tells Google to index the other URL instead of this one. This is intentional for duplicate variants but a problem if misconfigured.
What does "Self-Referencing" mean?
The canonical tag points to the same URL being checked. This is the correct setup for most pages — it confirms this is the preferred version for indexing.
Should every page have a canonical tag?
Yes. Every indexable page should have a self-referencing canonical tag. Pages that are duplicates or variants should point their canonical to the preferred version.
Does this tool follow redirects?
Yes. We detect redirect chains and show you where the URL ends up. If the canonical on the destination page does not match the final redirected URL, we flag it as an issue.
Don't Let Duplicate Content
Kill Your Rankings
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