DebugView

DebugView is a GA4 report that shows events from a single debug-enabled device streaming in as they happen, second by second.

You put a device into debug mode, then trigger actions on the site while watching the events land in real time with every parameter attached. It exists for one job: confirming that the tags you just built actually fire, with the values you expect, before you trust them in the standard reports that take a day to settle.

You add a new sign_up event and want to check the method parameter is populated. You open DebugView, run through the form, and watch sign_up appear with method set to email. You spot that a second, duplicate event fires on the thank-you page too, and you fix the trigger before it ever pollutes your data.

DebugView only shows the device you flagged. If you forget to enable debug mode, the report sits empty and people assume tracking is broken, when the events are flowing fine everywhere else.

Validate here first, or debug it in the reports a day too late.