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Verified 2026-09-18Partitioned Cookies (CHIPS)
Partitioned cookies keep third-party state separated by the top-level site that embeds it.
Use Partitioned only for a genuine cross-site embedded use case and pair it with Secure. Partitioning reduces cross-site tracking and changes how integrations find their state.
httpcookiesprivacysecuritybrowser
Reference (http)
Set-Cookie: widget_session=abc; Secure; HttpOnly; SameSite=None; Partitioned
Use Partitioned only for a genuine cross-site embedded use case and pair it with Secure. Partitioning reduces cross-site tracking and changes how integrations find their state.
Common mistakes
- Treating Partitioned as a general replacement for SameSite or assuming all browsers and server-side clients support it.