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Duplicate URL Detector

SEO

Detect duplicate URLs in a list and suggest canonical versions for SEO.

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URLs (one per line)
Duplicate Groups (2)
Canonical: https://example.com/blog/my-post
4 variants found:
· https://www.example.com/blog/my-post
· https://example.com/blog/my-post/
· http://example.com/blog/my-post?utm_source=newsletter&utm_medium=email
· https://www.example.com/blog/my-post?ref=homepage
Canonical: https://example.com/pricing
2 variants found:
· https://example.com/pricing
· https://example.com/pricing/
Deduplicated URL List
https://example.com/blog/my-post
https://example.com/pricing
https://example.com/contact

The same page reachable at four different-looking URLs, with and without www, with and without a trailing slash, over http instead of https, reads as four separate pages to a search engine unless something explicitly tells it otherwise, which is exactly the kind of duplicate content problem that quietly splits ranking signal across variants that were never meant to compete with each other. This tool scans a list of URLs for exactly that pattern, duplicate or near-duplicate variants of what's really the same page, and suggests which version should actually serve as the canonical one.

See more about the Duplicate URL Detector

Useful for catching duplicate URL variants before they split SEO value across pages that should be treated as one, cleaning up a sitemap or a URL list that's accumulated both http and https versions of the same pages, or confirming a canonical URL structure is actually being followed consistently across a site.

Key features

  • Clean interface
  • Fast processing
  • No signup required
  • Works offline

Quick answers for Duplicate URL Detector

What counts as the "same" URL despite different text?
A canonical form built by lowercasing the host, dropping a leading www., trimming trailing slashes, and removing known tracking parameters like utm_source, gclid, and fbclid.
What happens to lines that aren't valid URLs?
They're listed separately as unparseable rather than silently dropped or grouped in with the duplicates.
Can I get a cleaned, deduplicated list?
Yes, a Deduplicated URL List section outputs one canonical URL per unique page, ready to copy.