Age

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The HTTP Age response header indicates the time in seconds for which an object was in a proxy cache.

The header value is usually close to zero. If the value is 0, the object was probably fetched from the origin server; otherwise, the value is usually calculated as a difference between the proxy's current date and the Date general header included in the HTTP response.

Header type Response header
Forbidden header name No

Syntax

http
Age: <delta-seconds>

Directives

<delta-seconds>

A non-negative integer that represents the time in seconds for which the object was in a proxy cache.

Examples

http
Age: 24

Specifications

Specification
HTTP Caching
# field.age

Browser compatibility

Report problems with this compatibility data on GitHub
desktopmobile
Chrome
Edge
Firefox
Opera
Safari
Chrome Android
Firefox for Android
Opera Android
Safari on iOS
Samsung Internet
WebView Android
WebView on iOS
Age

Legend

Tip: you can click/tap on a cell for more information.

Full support
Full support

See also