Google Analytics event tracking - max string length

Question

I am using Google Analytics for tracking events in my Android App. My question is: is there a limit for the string length in an event? I have found nothing about this topic on Googles devguide site.

Best regards!

Edit: I tried it whith a string with 2000 characters - and it works. If you need more (I don't believe), than try it first.

Answer 1

According to the official documentation,

• Max Length for Event Category = 150 Bytes
• Max Length for Event Action = 500 Bytes
• Max Length for Event Label = 500 Bytes
• For all other parameters, you can check in the same page.

Long text is automatically truncated according to this doc:

If any of the values are greater than the maximum lengths, they will automatically be truncated. If a multi-byte character exceeds the maximum length, the entire character will be truncated.

Answer 2

@Pang's answer is correct for Universal Analytics (UA). But the latest version of Google Analytics isn't UA, it's Google Analytics 4 (GA4), and GA4 has different limits:

Logged item	Limit
Distinctly named events	500 per app instance (app) Automatically collected events, like first_open and in_app_purchase, and events you collect via enhanced measurement do not count toward the limits.
Length of event name	40 characters
Event parameters per event	25 event parameters
Length of event-parameter name	40 characters
Length of event-parameter value	100 characters
User properties	25 per property
Length of user-property names	24 characters
Length of user-property values	36 characters
Length of User-ID values	256 characters