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
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
| Specification | Status | Comment |
|---|---|---|
| Tracking Preference Expression (DNT) The definition of 'DNT Header Field for HTTP Requests' in that specification. |
Obsolete | Initial definition. |
Browser compatibility
BCD tables only load in the browser
The compatibility table in this page is generated from structured data. If you'd like to contribute to the data, please check out https://github.com/mdn/browser-compat-data and send us a pull request.
See also
Navigator.doNotTrackTkheader- Do Not Track on Wikipedia
- What Does the "Track" in "Do Not Track" Mean? – EFF
- donottrack.us
- DNT browser settings help: