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.