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The Age header contains the time in seconds the object has been in a proxy cache.
The Age header is usually close to zero. If it is Age: 0, it was probably just fetched from the origin server; otherwise It 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
Age: <delta-seconds>
Directives
- <delta-seconds>
-
A non-negative integer, representing time in seconds the object has been in a proxy cache.
Examples
Age: 24
Specifications
| Specification | Title |
|---|---|
| RFC 7234, section 5.1: Age | Hypertext Transfer Protocol (HTTP/1.1): Caching |
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.
| Feature | Chrome | Edge | Firefox | Internet Explorer | Opera | Safari |
|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes |
| Feature | Android webview | Chrome for Android | Edge mobile | Firefox for Android | Opera Android | iOS Safari | Samsung Internet |
|---|---|---|---|---|---|---|---|
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |