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


DNT: 0
DNT: 1


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


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"


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

Browser compatibility

FeatureChromeEdgeFirefoxInternet ExplorerOperaSafari
Basic support23 Yes49 Yes6
FeatureAndroid webviewChrome for AndroidEdge mobileFirefox for AndroidOpera AndroidiOS SafariSamsung Internet
Basic support Yes Yes Yes Yes Yes Yes Yes

See also

Document Tags and Contributors

Contributors to this page: fscholz, gavdaddy27
Last updated by: fscholz,