Autofylldata

Autofylldata is a standardized data model and protocol for collecting, storing, and autofilling user information across web forms and applications. It is intended to enable secure, user-controlled sharing of personal data among browsers, apps, and services while minimizing repeated data entry.

Autofylldata defines a structured schema of commonly used fields such as givenName, familyName, streetAddress, city, region, postalCode, country, email, phone, and payment tokens. It supports named profiles (for example, personal, work) and per-site or per-app scoping. Data can include optional metadata like provenance, consent status, timestamp, and quality indicators. Access to the data is mediated by portable APIs and requires explicit user consent, with cryptographic protection for data at rest and in transit.

Security and privacy considerations are central. Implementations typically require strong authentication for access, granular permission prompts, and user-controlled keys or tokens for decrypting sensitive fields such as payment data. Audit logging and data minimization practices are encouraged to enhance transparency and control.

Use cases include autofilling shipping and billing forms, creating and updating contact records across apps, and simplifying checkout experiences. The standard is designed to be interoperable with existing autofill technologies and privacy frameworks, though adoption depends on platform support and proper governance. Potential limitations include the risk of data leakage if permissions are misused and challenges with data accuracy across diverse services.

See also: Autofill, Web form automation, Password manager, Data portability.