Klaviyo Tracking Cookies
|__kla_id||Tracks when someone clicks through a Klaviyo email to your website|
|KL_FORMS_MODAL||Tracks when someone subscribes (opts in) to a form|
Due to a Safari update entitled ITP 2.1, cookies gathered while using the Safari web browser expire after seven days rather than lasting the full two years.
Using API to Access Cookies
Email to Website Tracking
When email to website tracking is enabled, Klaviyo identifies individuals that click through a Klaviyo email and browse your website. You can toggle on and off Klaviyo's ability to track email to website activity in your account's email settings.
To navigate to your email settings page click Account > Settings > Email.
When this is on, we add an additional parameter to all URLs in your emails to track activity. This is called the _kx parameter, and _kx will appear directly in the URL. The unique encrypted value is then decrypted by our web tracking and allows us to identify the user that clicked through the URL.
To learn more, check out our article on Klaviyo web tracking.