v152 · Deprecation · Privacy Sandbox

RWS Validator & Migration Guide

Paste your .well-known/related-website-set.json manifest and validate its structure. Shows which fields Chrome 152 still reads (for now), which are deprecated, and the recommended Storage Access API migration path for your member sites.

Related Website Sets is deprecated in Chrome 152 alongside the reversal of third-party cookie deprecation. The .well-known/related-website-set.json file format is still parsed but its storage-access integration will stop working. Member sites should migrate to document.requestStorageAccess().
Paste or load a manifest above, then click Validate.
Migration path for member sites:
  1. Remove any RWS-specific code that calls document.requestStorageAccessFor() from the top-level page.
  2. In embedded cross-site iframes, call await document.requestStorageAccess() in response to a user gesture.
  3. Check await document.hasStorageAccess() before reading cookies to avoid unnecessary prompts.
  4. The .well-known/related-website-set.json file can be removed once all embedded iframes have migrated.

see also