Free tools

Free Canonical URL Normalizer

Normalize protocol, host, trailing slash, and tracking parameters to detect duplicate URL variants quickly.

Copy-paste outputs

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Tool 01

Canonical URL Normalizer / Clusterer

Normalize URL variants and cluster duplicates to tighten canonical decisions.

Canonical URL Normalizer / Clusterer

Normalize URL variants and cluster duplicates to tighten canonical strategy.

URL list (one per line)

Remove leading www.

Remove tracking parameters (utm, gclid, fbclid, ref)

Clusters (4)

4 input URLs | 0 invalid

https://www.brandarmor.ai/features

https://www.brandarmor.ai/features?utm_source=linkedin

https://brandarmor.ai/features

https://brandarmor.ai/features/

http://brandarmor.ai/features

http://brandarmor.ai:80/features?ref=newsletter

https://brandarmor.ai/features?view=full

brandarmor.ai/features?utm_campaign=q1&view=full

{
  "clusters": [
    {
      "canonical": "https://www.brandarmor.ai/features",
      "variants": [
        "https://www.brandarmor.ai/features?utm_source=linkedin"
      ]
    },
    {
      "canonical": "https://brandarmor.ai/features",
      "variants": [
        "https://brandarmor.ai/features/"
      ]
    },
    {
      "canonical": "http://brandarmor.ai/features",
      "variants": [
        "http://brandarmor.ai:80/features?ref=newsletter"
      ]
    },
    {
      "canonical": "https://brandarmor.ai/features?view=full",
      "variants": [
        "brandarmor.ai/features?utm_campaign=q1&view=full"
      ]
    }
  ],
  "invalid": [],
  "totalInput": 4
}

How it works

Canonical URL Normalizer / Clusterer: methodology and worked example

How this tool computes its result

Parses each pasted URL (prepending https:// if no scheme is present), then normalizes it by lowercasing the protocol and hostname, optionally stripping a leading "www.", dropping default ports (443 for https, 80 for http), removing the hash fragment, collapsing duplicate slashes and a single trailing slash in the path, and rebuilding the query string with parameters sorted alphabetically — optionally dropping known tracking parameters (utm_source/medium/campaign/term/content, gclid, fbclid, msclkid, ref). URLs that normalize to an identical string are grouped into one cluster, listing every original variant line underneath it. Lines that fail to parse as a URL are reported separately as invalid.

Worked example

Using the tool's own default input with "strip tracking params" on and "strip www" off: "https://www.brandarmor.ai/features?utm_source=linkedin" normalizes to "https://www.brandarmor.ai/features"; "https://brandarmor.ai/features/" normalizes to "https://brandarmor.ai/features" (trailing slash dropped); "http://brandarmor.ai:80/features?ref=newsletter" normalizes to "http://brandarmor.ai/features" (default port and tracking param dropped, but protocol stays http); and "brandarmor.ai/features?utm_campaign=q1&view=full" becomes "https://brandarmor.ai/features?view=full". Because stripWww is off and protocol is never normalized, these four lines land in four separate clusters even though a human would treat them as the same page.

When not to use this tool

This is a purely syntactic string normalizer — it never makes a network request to check whether a URL actually resolves or redirects, and it never merges http:// with https:// duplicates automatically, so mixed-protocol variants of the same page always stay in separate clusters regardless of settings.

Common mistakes

- Leaving "Remove leading www." unchecked and assuming www.example.com and example.com will still cluster together — they won't, since hostname stripping is opt-in and off by default.
- Mixing bare domains with full URLs and expecting a single protocol to win — the tool only adds https:// when no scheme is present at all; an explicit http:// URL keeps http and is never reconciled with an https:// duplicate of the same page.
- Assuming query-parameter stripping removes everything non-canonical — only the fixed tracking-parameter list (utm_*, gclid, fbclid, msclkid, ref) is dropped; any other parameter (like a custom "view=full") is preserved and sorted, so it can still split otherwise-identical URLs into separate clusters.

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