Canonical URL Checker
Verify canonical tag implementation and prevent duplicate content issues on your site. Essential for large websites and e-commerce platforms.
π Check Canonical Tag
Canonical Tag Found
Your page has a properly implemented canonical tag.
π What is a Canonical URL?
A canonical URL is the preferred version of a web page that search engines should index when multiple URLs contain similar or identical content. The rel="canonical" link element tells search engines which URL is the master copy, preventing duplicate content issues and consolidating link equity.
Without proper canonical tags, search engines may split ranking signals between multiple versions of the same content, diluting your SEO efforts and potentially causing the wrong page to rank.
β Common Canonical Issues
- Missing Canonical Tags: Pages without any canonical reference
- Self-Referencing Canonicals: Canonical pointing to a different URL than the current page
- Canonical Chains: Page A β Page B β Page C (should be direct)
- Canonical Loops: Page A β Page B β Page A (infinite loop)
- Non-Indexable Canonicals: Canonical pointing to a page blocked by robots.txt
- HTTP/HTTPS Mismatch: Canonical using HTTP when site uses HTTPS
How to Use the Canonical URL Checker
Follow these simple steps to audit your canonical tags and fix duplicate content issues:
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Step 1: Enter Your URL
Paste or type the full URL you want to check into the input field above, including the https:// protocol. -
Step 2: Run the Check
Click the "Check Canonical" button to analyze the page for canonical tag presence, self-referencing, and protocol consistency. -
Step 3: Review the Score
Check the overall grade (A-F) and read the detailed breakdown of each test including HTTPS, trailing slashes, and www consistency. -
Step 4: Fix Issues
Follow the actionable code snippets and recommendations to resolve missing tags, loops, chains, or protocol mismatches.
Popular Use Cases
- E-Commerce Stores: Prevent duplicate product pages from parameter URLs (filters, sorting, pagination) from cannibalizing rankings.
- Multi-Language Sites: Ensure hreflang and canonical tags work together correctly without conflicting signals.
- Content Syndication: Verify that syndicated content points back to the original source with a proper cross-domain canonical.
- Site Migrations: Audit canonicals after platform changes or domain moves to prevent traffic loss.
What Users Say
Real feedback from SEO specialists and developers who use our Canonical URL Checker:
