What the __kla_id cookie does
When Klaviyo’s JavaScript is enabled, the __kla_id cookie can track and identify site visitors through an auto-generated ID. This cookie can temporarily hold personally identifiable information. Once a visitor is identified, the cookie can pass their data into Klaviyo.
Who sets it
Consent category: marketing
Marketing cookies follow visitors across sites to build advertising profiles and to measure campaigns. They always require prior consent, and a consent banner has to block them until the visitor agrees.
| Name | __kla_id |
|---|---|
| Category | Marketing |
| Lifetime | 2 years |
| Set by | Klaviyo |
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From the Conzent cookie database, last updated 2026-11-12. Descriptions come from vendor documentation, cookie policies and our own scans; write to support@getconzent.com to correct one.