What is the pxid cookie?
Typically, it is enabled when a Publisher owned multiple domains and has an interest in identifying their users consistently across their domains. The URL of the referrer header has to match a pre-configured list of domains (configured in the Permutive dashboard). We refer to this service as the “Secure Permutive 3P cookie”, and will not be shared between Publishers. This PXID 3P cookie varies Publisher by Publisher.
Our October 2026 scan found it on 8 sites (0% of the 2,450 we scanned), set before any consent.
- Purpose
- Functional
- Belongs to
- Permutive
- Set as
- Third-party (under another company's domain)
- Typical lifetime
- 3 months (vendor says: 89 Days) — about what the vendor documents
Sites that set pxid before consent
The highest-ranked 8 of 8 sites.
- globo.com24 tracking companies
- uol.com.br17 tracking companies
- lanacion.com.ar14 tracking companies
- clarin.com13 tracking companies
- cronista.com9 tracking companies
- kooora.com13 tracking companies
- ctvnews.ca38 tracking companies
- globalnews.ca10 tracking companies
Related cookies
Other cookies from Permutive.
- permutive-id8 sites
How to stop it
Declining non-essential cookies in a site's consent banner should stop pxid being set on later visits. Blocking third-party cookies in your browser settings stops the third-party kind everywhere, and clearing cookies for a site removes any it already set.
Description from the Open Cookie Database (Apache 2.0).
Understanding this page
- How cookie lifetimes work, and why a 13-month _ga matters
What a cookie's "expires" field actually controls, why Google Analytics ships a 2-year default that many sites cut down to 13 months, and how Safari's 7-day cap on script-set cookies changes the picture.
- First-party vs third-party cookies (and why "first-party" still tracks you)
What the distinction actually means technically, why browsers only block one of the two, and how CNAME cloaking, server-side tagging and cookies like _ga let sites keep tracking under their own domain.
- How to block or limit trackers
Browser privacy settings, content blockers, Global Privacy Control and clearing cookies compared honestly — what each one actually stops, what it doesn't, and what it costs you in return.