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 non-standard and is not on a standards track. Do not use it on production sites facing the Web: it will not work for every user. There may also be large incompatibilities between implementations and the behavior may change in the future.

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

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.

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 header name yes


DNT: 0
DNT: 1
DNT: null



The user prefers to allow tracking on the target site.


The user prefers not to be tracked on the target site.


The user has not specified a preference about tracking.


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


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

Browser compatibility

BCD tables only load in the browser

See also