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Is there any character limit set on the attributes?

·Apr 21, 2026 06:43 AM·

Is there any character limit set on the attributes?

1 comment

· Sorted by Oldest

kapa.ai
APP
·
(edited)·
Yes, Mixpanel has several character and size limits on properties (attributes):
Event Properties
Property names/values: Max 255 characters (longer values are truncated) [Events FAQ]
Max properties per event: 255 properties [Events FAQ]
String values: Limited to 255 bytes [Data Types]
List properties: Max 8KB per event property [Data Types]
Object properties: Max 8KB, up to 255 keys per nested object, max nesting depth of 3 [Data Types]
List of Objects: Max 8KB, max 255 keys, no nesting [List of Objects]
User Profile Properties
Property names: Max 255 characters [User Profiles FAQ]
Max properties per profile: 2,000 properties [User Profiles FAQ]
List properties: Max 256KB [Data Types]
Object properties: Max 256KB [Data Types]
Other Notable Limits
Distinct event names: Soft limit of 5,000 — exceeding this causes indexing failures and the event names won't appear in autocomplete menus. [Events FAQ]
$insert_id: Must be ≤ 36 bytes and contain only alphanumeric characters or -. [Import Events]
ℹ️ Tip: Mention @kapa.ai in the thread for follow-ups or DM the app for 1-to-1 help.