/.well-known/traffic-advice
type: TechArticle
description: A JSON file that tells private prefetch proxies — most notably Chrome's — whether to send prefetch traffic to your origin, and at what fraction. Optional opt-out / throttle mechanism, provisionally registered with IANA.
language: en
is part of: Web Specification Studio
author: Web Specification Studio
publisher: Web Specification Studio
license: https://creativecommons.org/licenses/by/4.0/
date modified: 2026-05-29T17:54:33.000Z
citation: Traffic Advice — formal specification
  type: CreativeWork
  publisher: Jeremy Roman (editor) / Private Prefetch Proxy community
citation: private-prefetch-proxy on GitHub — traffic-advice.md
  type: CreativeWork
  publisher: Private Prefetch Proxy community
citation: IANA — Well-Known URIs Registry
  type: CreativeWork
  publisher: IANA
citation: Private Prefetch Proxy
  type: CreativeWork
  publisher: Chrome for Developers

Web Specification Studio
type: WebSite

Web Specification Studio
type: Organization

breadcrumb
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item list element: Home
  type: ListItem
  position: 1
  item: https://webspecification.com/
item list element: Spec
  type: ListItem
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  item: https://webspecification.com/spec/
item list element: Well-Known URIs
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  position: 3
  item: https://webspecification.com/spec/well-known/
item list element: /.well-known/traffic-advice
  type: ListItem
  position: 4
  item: https://webspecification.com/spec/well-known/traffic-advice/