GA4 Testing Lab

Analytics Status

Not Connected

Measurement ID:G-5EMZENJY48

Current UserID:Not set

Set Custom User ID

Override the User ID for testing purposes

LIFF Integration

Initializing...

LIFF is auto-initializing on this page...

How to see User ID in GA4 Reports

Go to GA4 Admin → Custom Definitions → Create Custom Dimension
Dimension Name: User ID String
Scope: Event (or User)
Event Parameter: line_user_id
Save and wait 24-48 hours for data to appear
In Reports, add Secondary Dimension → "User ID String"

Note: Events sent to GA4 take time to process. Use DebugView for real-time testing.

Quick Test Actions

Custom Event Builder

Event Name

Category

Action

Label

Value (number)

Custom Parameter Key

Custom Parameter Value

Event Log

0 events

No events tracked yet