Privacy Sandbox Proposals
ImportantOctober 2025: Google officially announced the deprecation of (most of) the Privacy Sandbox APIs for the Web and Android, see this status overview.
The Privacy Sandbox is an initiative from Google to reduce “cross-site and cross-app tracking while helping to keep online content and services free for all”. It is composed of more than 20 proposals that can fundamentally disrupt the advertising, mobile, and web ecosystems.
The Privacy Sandbox for the Web is a series of proposals made by Google to phase out third-party cookies and reduce web tracking while still supporting cross-site use cases such as ads targeting or robot and spam detection. To do so, Google proposes to replace some of the current web components and APIs, that have been diverted from their initial purpose to enable extensive tracking (e.g., third party cookies), with privacy-preserving alternatives.
The goals of the Privacy Sandbox on Android are similar; reduce user tracking on Android by deprecated access to cross-app identifiers such as Advertising ID and limiting the scope that third party libraries in smartphone applications can access.
You will find below a list of all proposals in the Privacy Sandbox mapped to corresponding analyses from different actors.
- Analyses (General)
- Attestation/Enrollment
- Attribution Reporting API
- Bounce Tracking Mitigations
- CHIPS
- DNS-over-HTTPS
- Federated Credential Management API
- Fenced Frames
- FLoC API
- IP Protection
- Privacy Budget
- Privacy State Tokens
- Private Aggregation API
- Protected Audience API (FLEDGE)
- Related Website Sets
- SDK Runtime
- Shared Storage API
- Storage and Network State Partitioning
- Topics API
- User-Agent Reduction & User-Agent Client Hints