UTM Builder

Add UTM tracking parameters to a URL so your analytics can tell exactly where a click came from.

About this tool

UTM parameters let analytics tools attribute a visit to a specific link instead of lumping it into generic referral traffic. Fill in source, medium and campaign and this tool appends them correctly encoded.

A note on the base URL

If your URL already has query parameters, they're kept. A matching utm_ parameter already in the URL gets replaced, not duplicated. Everything runs locally.