跳转到主要内容

DNT header

{{non-standard_header}}

[!NOTE]NOTE: The DNT (Do Not Track) specification has been discontinued. See {{domxref("Navigator.doNotTrack")}}doNotTrack for more information.

The HTTP DNT (Do Not Track) {{Glossary("request header")}}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 {{HTTPHeader("Sec-GPC")}}GPC header, and accessible to clients from {{domxref("navigator.globalPrivacyControl")}}globalPrivacyControl.

Header type {{Glossary("[Request header")}}header](https://developer.mozilla.org/en-US/docs/Glossary/Request%20header)
{{Glossary("[Forbidden request header")}}header](https://developer.mozilla.org/en-US/docs/Glossary/Forbidden%20request%20header) 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 {{domxref("Navigator.doNotTrack")}}doNotTrack property:

navigator.doNotTrack; // "0", "1" or null

Specifications

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

Browser compatibility

{{Compat}}

See also