UTM Link Builder
Build campaign URLs with utm_source, utm_medium and utm_campaign tags — live output, validation and clean encoding in your browser.
Result
UTM parameters are the tagging convention analytics platforms use to attribute traffic: utm_source names where the visitor came from, utm_medium names the channel type, and utm_campaign names the specific push. Get them right and every report answers "what worked?"; get them inconsistent and the same campaign splinters into five rows of noise.
This builder keeps the links honest. Paste any landing page URL — existing query parameters survive untouched — fill in the tags, and the finished link is rebuilt live with every value properly percent-encoded. Validation flags a malformed URL and reminds you when source, medium or campaign is still empty, since analytics tools expect all three.
Consistency is the whole game with UTM tagging, so two toggles enforce the common conventions automatically: lowercase everything (analytics parameters are case-sensitive, so "Email" and "email" become two different channels) and spaces to dashes (a space in a tag turns into %20 and reads terribly in reports).
The tool remembers your last five built links — stored only in your browser's local storage, never on a server — so repeating yesterday's campaign pattern is one click. And when you need to take an existing tagged link apart instead of building one, the URL Parser tool on this site decodes every parameter back out.