What belongs in rel=canonical?

The URL you want indexed: usually https, lowercase host, no default port, no tracking query, no hash. Path case and trailing slashes should match what the server actually serves.

Which query params are dropped?

utm_*, fbclid, gclid, gbraid, wbraid, msclkid, mc_eid, _ga, _gl, igshid, vero_id, oly_*, ref, ref_src. Functional params (page, id, q) stay.

Does this fetch the URL?

No. It only rewrites the string you paste. It cannot see redirects or HTTP vs HTTPS on the live host.

Same as a UTM builder?

Opposite job. UTM adds campaign tags. This strips them for the canonical you put in the head.

Runs in your browser · Last updated 7 September 2026

Free Canonical URL Builder

Free canonical URL builder. https, lowercase host, drop utm/gclid/hash, sort query. Browser tool — nothing is uploaded.

URL

Force httpsDrop utm_ / gclid / fbclidSort query keysDrop hashLowercase pathTrailing slash

Canonical

https://www.example.com/Blog/?a=1&b=2

Host

www.example.com

Path

/Blog/

Dropped params

utm_source

How to use this tool

Paste a dirty URL (scheme, port, utm, hash).
Choose slash and path-case policy to match the live server.
Copy the canonical into a link rel=canonical or sitemap.

Worked example

HTTP://WWW.Example.com:443/Blog/?utm_source=x&b=2&a=1#frag becomes https://www.example.com/Blog/?a=1&b=2. Add campaign tags on the UTM generator; slug a path on slugify.

Frequently asked questions

What belongs in rel=canonical?: The URL you want indexed: usually https, lowercase host, no default port, no tracking query, no hash. Path case and trailing slashes should match what the server actually serves.
Which query params are dropped?: utm_*, fbclid, gclid, gbraid, wbraid, msclkid, mc_eid, _ga, _gl, igshid, vero_id, oly_*, ref, ref_src. Functional params (page, id, q) stay.
Does this fetch the URL?: No. It only rewrites the string you paste. It cannot see redirects or HTTP vs HTTPS on the live host.
Same as a UTM builder?: Opposite job. UTM adds campaign tags. This strips them for the canonical you put in the head.
Uploaded?: No.