DNT header

Deprecated: This feature is no longer recommended. Though some browsers might still support it, it may have already been removed from the relevant web standards, may be in the process of being dropped, or may only be kept for compatibility purposes. Avoid using it, and update existing code if possible; see the compatibility table at the bottom of this page to guide your decision. Be aware that this feature may cease to work at any time.

Non-standard: This feature is not standardized. We do not recommend using non-standard features in production, as they have limited browser support, and may change or be removed. However, they can be a suitable alternative in specific cases where no standard option exists.

Note: The DNT (Do Not Track) specification has been discontinued. See Navigator.doNotTrack for more information.

The HTTP DNT (Do Not Track) request header indicates the user's tracking preference. It lets users indicate whether they would prefer privacy rather than personalized content.

DNT is deprecated in favor of Global Privacy Control, which is communicated to servers using the Sec-GPC header, and accessible to clients from navigator.globalPrivacyControl.

Header type	Request header
Forbidden request header	Yes

Syntax

http

DNT: 0
DNT: 1
DNT: null

Directives

0: The user prefers to allow tracking on the target site.
1: The user prefers not to be tracked on the target site.
null: The user has not specified a preference about tracking.

Examples

undefined

Reading Do Not Track status from JavaScript

The user's DNT preference can also be read from JavaScript using the Navigator.doNotTrack property:

navigator.doNotTrack; // "0", "1" or null

Specifications

Part of the discontinued Tracking Preference Expression (DNT) specification.