This workflow gives you a small form hosted by n8n. You paste a page link and fill in the source, medium and campaign. A Code step checks the link, lowercases the tags and adds them as utm_source, utm_medium and utm_campaign, keeping any query string the page already has.

Each tagged link is appended to a Google Sheet so the team can see which campaigns were built and when. The form then shows the finished link, so it can be copied straight into an email or post.