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/HTTP

DNT

The 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.

Header type	Request header
Forbidden header name	yes

Syntax

DNT: 0
DNT: 1

Directives

0: The user prefers to allow tracking on the target site.
1: The user prefers not to be tracked on the target site.

Examples

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" or "1"

Specifications

Specification	Status	Comment
Tracking Preference Expression (DNT) The definition of 'DNT Header Field for HTTP Requests' in that specification.	Working Draft	Initial definition.

Browser compatibility

Feature	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari
Basic support	23	Yes	4	9	Yes	6

Feature	Android webview	Chrome for Android	Edge mobile	Firefox for Android	IE mobile	Opera Android	iOS Safari
Basic support	Yes	Yes	Yes	Yes	Yes	Yes	Yes