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Canonical Tag Generator

Generate rel=canonical HTML tags to fix duplicate content and boost your SEO.

Enter the preferred (canonical) version of the URL.

What Is a Canonical Tag?

A canonical tag (officially rel="canonical") is an HTML element that helps search engines understand which version of a webpage is the "master" or preferred version. When multiple URLs serve similar or identical content, the canonical tag tells Google which URL should be indexed and credited with link equity.

Why Duplicate Content Hurts SEO

Duplicate content occurs when the same (or very similar) content is accessible at multiple URLs. This happens naturally in many situations:

  • HTTP vs HTTPS versions (http://site.com vs https://site.com)
  • With and without www (www.site.com vs site.com)
  • Trailing slash differences (/page/ vs /page)
  • URL parameters (/page?sort=asc vs /page)
  • Syndicated content on multiple domains

Without canonicalization, search engines may split your link equity across multiple versions, reducing each URL's ranking potential.

How to Implement Canonical Tags

  1. Generate your canonical tag using this tool.
  2. Copy the generated <link rel="canonical"> tag.
  3. Paste it inside the <head> section of every duplicate page, pointing to the canonical URL.
  4. On the canonical page itself, add a self-referencing canonical tag (pointing to its own URL).

Self-Referencing Canonical Tags

Best practice is to include a canonical tag on every page, including the canonical version itself. This "self-referential" canonical tag reinforces to Google which URL is preferred and prevents future accidental duplicates.

Canonical Tags vs 301 Redirects

Both methods consolidate duplicate content, but serve different purposes. Use 301 redirects when you want to permanently redirect users and crawlers away from the old URL. Use canonical tags when you want to keep the duplicate URL accessible (e.g., for tracking parameters) but signal the preferred page to search engines.