/.well-known/webauthn
type: TechArticle
description: A JSON document at /.well-known/webauthn lists the origins allowed to use passkeys scoped to a single Relying Party ID. It enables WebAuthn Related Origin Requests — one passkey shared across several domains you own. Only applicable if the site uses passkeys across more than one origin.
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: 2026-06-08T12:00:00.000Z
citation: Web Authentication: An API for accessing Public Key Credentials — Level 3
  type: CreativeWork
  publisher: W3C Web Authentication Working Group
citation: IANA — Well-Known URIs Registry
  type: CreativeWork
  publisher: IANA
citation: Allow passkey reuse across your sites with Related Origin Requests
  type: CreativeWork
  publisher: web.dev

Web Specification Studio
type: WebSite

Web Specification Studio
type: Organization

breadcrumb
type: BreadcrumbList
item list element: Home
  type: ListItem
  position: 1
  item: https://webspecification.com/
item list element: Spec
  type: ListItem
  position: 2
  item: https://webspecification.com/spec/
item list element: Well-Known URIs
  type: ListItem
  position: 3
  item: https://webspecification.com/spec/well-known/
item list element: /.well-known/webauthn
  type: ListItem
  position: 4
  item: https://webspecification.com/spec/well-known/webauthn/