UTM Parameters in QR Codes: Track Campaigns Without Bloating the Symbol

1. The Density Problem

A full UTM string such as utm_source, utm_medium, and utm_campaign can add 60 or more characters. That increases the QR version and shrinks modules.

2. A Cleaner Pattern

1. Give each placement a short path on your own site, e.g. example.com/m1 for the lobby poster. 2. Have your web server redirect that path to the long UTM URL. 3. Analytics then attributes the visit correctly while the printed code stays small.

3. Naming Conventions

Use utm_medium=qr consistently, lowercase values, and one utm_campaign per print run. Use a different path per location so you can compare placements.

4. Trade-off

A redirect you control is still a redirect: if you lose the domain or break the path, printed codes fail. Keep the mapping documented.