Bulk Canonical URL Generator
Normalize URLs and generate canonical link tags to prevent duplicate content issues
Normalization Rules
Output
What Is a Canonical URL?
A canonical URL is the "preferred" version of a page when multiple URLs serve the same or similar content.<link rel="canonical" href="..."> tag tells search engines which URL to index and consolidate ranking signals to, preventing duplicate content issues that can dilute your SEO performance.
Common Duplicate URL Issues
HTTP vs HTTPS
http://example.com and https://example.com are treated as different URLs. Always canonicalize to HTTPS.
www vs non-www
www.example.com and example.com are separate hostnames. Choose one and stick with it across your entire site.
Trailing Slash
/page and /page/ are technically different URLs. Google usually treats them the same, but being consistent avoids confusion.
Query Parameters
UTM tags, session IDs, and tracking parameters create duplicate URLs. Strip them in the canonical to consolidate link equity.
Best Practices
- ✓ Every page should have a self-referencing canonical tag, even if it's the only version
- ✓ Canonical URLs must be absolute (include the full domain), not relative paths
- ✓ The canonical URL should return a 200 status code — never point to a redirect, 404, or 5xx page
- ✓ Use the same canonical URL consistently across all duplicate versions of a page
- ✓ In GSC, check the "Page indexing" report for "Alternate page with proper canonical tag" status
- ✓ Combine canonical tags with 301 redirects for stronger signals
Frequently Asked Questions
Is the canonical tag a directive or a hint?
It's a hint. Google usually respects canonical tags, but may choose a different canonical if signals conflict (e.g., internal links point to a different URL, the canonical page is noindexed, or the content differs significantly).
Should I use canonical tags or 301 redirects?
Use 301 redirects when you want to permanently remove access to the duplicate URL. Use canonical tags when both URLs need to remain accessible (e.g., print versions, filtered views, parameter variations).
Can I use canonical tags across different domains?
Yes. Cross-domain canonicals are supported and useful when republishing content. However, Google may not always respect cross-domain canonicals if the content differs or the domains have very different authority levels.