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The Origin request header indicates where a fetch originates from. It doesn't include any path information, but only the server name. It is sent with CORS requests, as well as with POST requests. It is similar to the Referer header, but, unlike this header, it doesn't disclose the whole path.
| Header type | Request header |
|---|---|
| Forbidden header name | yes |
Syntax
Origin: "" Origin: <scheme> "://" <host> [ ":" <port> ]
Origin can be the empty string: this is useful, for example, if the source is a data URL.
Directives
- <scheme>
- The protocol that is used. Usually it is the HTTP protocol or its secured version, HTTPS.
- <host>
- The domain name of the server (for virtual hosting) or the IP.
- <port> Optional
- TCP port number on which the server is listening. If no port is given, the default port for the service requested (e.g., "80" for an HTTP URL) is implied.
Examples
Origin: https://developer.mozilla.org
Specifications
| Specification | Comment |
|---|---|
| RFC 6454, section 7: Origin | The Web Origin Concept |
| Fetch The definition of 'Origin header' in that specification. |
Supplants the Origin header as defined in RFC6454. |
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 | Servo |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |
| Feature | Android | Chrome for Android | Edge Mobile | Firefox for Android | IE Mobile | Opera Mobile | Safari Mobile |
|---|---|---|---|---|---|---|---|
| Basic Support | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) | (Yes) |