Client Hints

User-Agent Client Hints - the successor to the traditional User-Agent string

AfterHer

Your girlfriend is waiting

She keeps the relationship alive.

She calls you

She sends a photo

Jealous and loyal

JavaScript Client Hints (navigator.userAgentData)

HTTP Client Hints Headers

About Client Hints

Client Hints is a set of HTTP request header fields and a JavaScript API that provides device-specific information. Unlike the traditional User-Agent string, Client Hints are designed to be more privacy-preserving by only providing information that the server explicitly requests. Low entropy hints (brand, mobile, platform) are sent by default, while high entropy hints (full version, architecture, model) require explicit permission.