{"page":"/blog/prebid-server-cookie-sync","modified":"2026-11-10","license":"https://creativecommons.org/licenses/by/4.0/","columns":["Setting","PBS-Go key (default)","PBS-Java key (default)"],"rows":[["Cookie domain","host_cookie.domain (empty, so the request host)","host-cookie.domain (not set)"],["Cookie lifetime","host_cookie.ttl_days (90)","host-cookie.ttl-days (90)"],["Cookie size cap","host_cookie.max_cookie_size_bytes (0, no cap)","host-cookie.max-cookie-size-bytes (4096)"],["Public URL used in sync redirects","external_url (http://localhost:8000)","external-url (http://localhost:8080)"],["Default syncs per call","account_defaults.cookie_sync.default_limit (none)","cookie-sync.default-limit (8)"],["Cooperative sync default","user_sync.coop_sync.default (false)","cookie-sync.coop-sync.default (true)"],["Bidder priority groups","cookie_sync.priority_groups per account","cookie-sync.pri"],["Block iframe syncs per bidder","cookie_sync.disabled_iframe_bidders (since 4.7.0)","n/d in config docs"],["Sync URL macros","{{.GDPR}}, {{.RedirectURL}}","{gdpr}, {redirect_url} (single braces since 4.0.0)"]],"sourceUrls":[[],[],[],[],[],[],[],[],[]]}