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HTTP security header

Referrer-Policy

The Referrer-Policy header governs how much of the originating URL is sent in the Referer header on navigation and resource requests. A restrictive policy prevents leaking sensitive path or query data (tokens, IDs) to third-party sites and analytics.

Example

Referrer-Policy: strict-origin-when-cross-origin

Configuration guidance

  • Use strict-origin-when-cross-origin or no-referrer for sensitive apps.
  • Never place secrets in URLs, regardless of referrer policy.

Related headers

MDN: Referrer-Policy

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