Canonical Tag Checker - SEO Canonical URL Analyzer

Canonical Tag Checker

Verify canonical URLs to prevent duplicate content issues

Note: Canonical tags tell search engines which version of a URL to index. Proper implementation prevents duplicate content issues.
Enter the full URL to check canonical tag
Canonical Tag Guide
What is a Canonical Tag?

A canonical tag (<link rel="canonical">) tells search engines which version of a URL is the preferred one to index. This prevents duplicate content issues when the same content is accessible via multiple URLs.

When to Use
  • βœ“ URL parameters (sorting, filtering)
  • βœ“ HTTP vs HTTPS versions
  • βœ“ WWW vs non-WWW versions
  • βœ“ Mobile vs desktop URLs
  • βœ“ Syndicated or scraped content
Implementation Example
<head> <link rel="canonical" href="https://example.com/page" /> </head>
Common Mistakes
  • βœ— Multiple canonical tags on one page
  • βœ— Canonical pointing to 404 page
  • βœ— Canonical in body instead of head
  • βœ— Relative URLs instead of absolute
  • βœ— Canonical chains (Aβ†’Bβ†’C)
Canonical Tag Best Practices
Practice Recommendation
Self-Referencing Every page should have a canonical pointing to itself
Absolute URLs Always use full absolute URLs (https://...)
One Per Page Only one canonical tag per page
In <head> Place canonical in the head section only
HTTPS Preferred Canonical should use HTTPS if available
Consistent Align with og:url, twitter:url, and sitemap