Canonical URLs Explained: What They Are and How to Use Them

A canonical URL tells search engines which version of a page is the "official" one when multiple URLs contain similar or identical content.

When You Need Canonicals

• Same product accessible via multiple category URLs
• HTTP vs HTTPS, www vs non-www variants
• URL parameter variations (?sort=price)
• Pagination (?page=2)
• Syndicated content on multiple domains

Implementation

<link rel="canonical" href="https://example.com/preferred-url" />

Common Mistakes

• Pointing canonical to a 404 page
• Using relative URLs instead of absolute
• Setting every page's canonical to the homepage
• Conflicting canonical and hreflang tags

Generate Clean URLs

Start with clean slugs using our URL slug generator to reduce the need for canonicals.