DNT

RequestActive

DNT (Do Not Track) was a browser header that signaled the user's preference not to be tracked for behavioral advertising. DNT: 1 means track nothing; DNT: 0 means tracking is consented to. The header was never legally enforceable, had no consistent server-side implementation, and was deprecated by browsers – Chrome removed it in 2024.

DNT: 0 | 1 | null

Description

DNT was a voluntary privacy signal with no enforcement mechanism. Major ad networks and platforms largely ignored it. The W3C working group disbanded in 2019 after failing to reach consensus. Firefox removed its global DNT UI in 2023. Chrome removed support in 2024. The replacement framework is the Global Privacy Control (GPC) header, which has legal recognition in some US states under CCPA. DNT: null means the user has not set a preference.

Examples

Do not track

http

GET /page HTTP/1.1
DNT: 1

Specification

W3C DNT (deprecated) – DNT specification →