Build clean UTM links in seconds

A UTM builder is a tool that appends UTM (Urchin Tracking Module) parameters to your URLs so you can track where your website traffic comes from. UTM parameters — utm_source, utm_medium, utm_campaign, utm_term, and utm_content — are recognized by analytics platforms like Google Analytics, helping you measure the effectiveness of your marketing campaigns. For the habits that keep that data clean as you scale, see UTM tracking best practices.

UTM parameters are five tags you add to the end of a URL: utm_source (where the traffic comes from, e.g. google, twitter), utm_medium (the marketing medium, e.g. cpc, email, social), utm_campaign (the campaign name, e.g. spring-sale), utm_term (the paid keyword), and utm_content (used to differentiate similar content or links). Only source, medium, and campaign are required. For a full breakdown, see UTM parameters explained.

Inconsistent UTM naming is the number one cause of messy analytics data. “Facebook” vs “facebook” vs “fb” creates three separate entries in your reports. MissingLinkz automatically sanitizes all parameter values to lowercase, hyphenated format — ensuring your campaign data stays clean and consistent across your entire team. Read our UTM naming convention guide to standardize your taxonomy.

Yes. MissingLinkz includes a CLI tool (installed via npm install -g missinglinkz) and an MCP server that works with Claude, Cursor, and other AI agents. You can generate UTM links programmatically in CI/CD pipelines, marketing automation workflows, or directly from your AI assistant. See how to build UTM links with an AI agent, or building UTM links for Campaign Monitor email campaigns.

Yes, the web-based UTM builder is completely free with no signup required. The CLI tool also has a generous free tier — 1,000 links per month with no credit card. For teams that need shared taxonomy enforcement, workspace collaboration, and shareable preflight reports, the Team plan is $49/month. Every plan runs in CI/CD with pass/fail exit codes; Team adds pipeline enforcement of your shared taxonomy.