Build a properly tagged campaign URL by adding utm_source, utm_medium, utm_campaign and optional term/content parameters — so your analytics attributes traffic correctly. Encoding is handled for you. Runs in your browser.
UTM Campaign Link Builder helps you optimise and publish with confidence, producing clean, standards-friendly output you can paste straight into your site.
Source, medium and campaign are the common required trio; term and content are optional.
Yes — it adds to them.
No — local only.