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.
Candidate Recommendation Initial definition.

Browser compatibility

Update compatibility data on GitHub
DesktopMobile
ChromeEdgeFirefoxInternet ExplorerOperaSafariAndroid webviewChrome for AndroidEdge MobileFirefox for AndroidOpera for AndroidSafari on iOSSamsung Internet
Basic supportChrome Full support 23Edge Full support YesFirefox Full support 4IE Full support 9Opera Full support YesSafari Full support 6WebView Android Full support YesChrome Android Full support YesEdge Mobile Full support YesFirefox Android Full support YesOpera Android Full support YesSafari iOS Full support YesSamsung Internet Android Full support Yes

Legend

Full support  
Full support

See also

Document Tags and Contributors

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