Ad URL & UTM Checker is a free tool I built with Bolt that checks Google Ads URL setup before a campaign goes live. You paste your final URLs, and optionally the tracking template and final URL suffix. It flags problems Google documents, like a template with no {lpurl} or a suffix that starts with '?', catches likely ValueTrack typos such as {campaign_id}, and warns when UTM values differ only by case, which GA4 counts as different values. Every finding is labelled as a Google-documented error, a guidance warning or a heuristic check, and it shows the landing URL each line would produce. Nothing you paste leaves your browser. Try it: https://ad-url-utm-checker.bolt.host