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
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.
Update compatibility data on GitHub
| Desktop | Mobile | |||||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|
DNT | Chrome Full support 23 | Edge Full support Yes | Firefox Full support 4 | IE Full support 9 | Opera Full support Yes | Safari No support 6 — 12.1 | WebView Android Full support Yes | Chrome Android Full support Yes | Firefox Android Full support Yes | Opera Android Full support Yes | Safari iOS No support ? — 12.2 | Samsung Internet Android Full support Yes |
Legend
- Full support
- Full support
- No support
- No support
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: