W3cubDocs

/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.

Syntax

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

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

Browser compatibilityUpdate compatibility data on GitHub

Desktop
Chrome Edge Firefox Internet Explorer Opera Safari
DNT 23 12 4 9 Yes 6 — 12.1
Mobile
Android webview Chrome for Android Firefox for Android Opera for Android Safari on iOS Samsung Internet
DNT Yes Yes Yes Yes ? — 12.2 Yes

See also

© 2005–2020 Mozilla and individual contributors.
Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/DNT