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HTTP Headers for Static Sites – Render Docs

HTTP Headers for Static Sites

Because don't have a server-side component that can inject custom HTTP response headers, you can define response headers for your static sites in the Render Dashboard.

Header syntax

The header path must be a relative path without the domain. It will be matched with all custom domains attached to your site.

You can use wildcards to match arbitrary request paths.

PathEffect
/*Matches all request paths.
/blog/*Matches /blog/, /blog/latest-post/, and all other paths under /blog/
/**/*Matches /blog/, /assets/, and all other paths with at least two slashes.
/*.cssMatches /tokens.css and /mode.css, but not /assets/theme.css
/**/*.cssMatches /assets/theme.css but not /tokens.css

The name is the case-insensitive name for the header. Examples include:

  • Cache-Control
  • X-Frame-Options
  • Referrer-Policy

The value of the header is sent as-is in the response. Examples include:

  • public, max-age=86400
  • DENY
  • same-origin

The header key is normalized and the value is appended to it to form the response:

  • cache-control: public, max-age=86400
  • x-frame-options: DENY
  • referrer-policy: same-origin