The Content-Length entity header indicates the size of the entity-body, in bytes, sent to the recipient.
| Header type | Entity header |
|---|---|
| Forbidden header name | yes |
Content-Length: <length>
| Specification | Title |
|---|---|
| RFC 7230, section 3.3.2: Content-Length | Hypertext Transfer Protocol (HTTP/1.1): Message Syntax and Routing |
| Desktop | ||||||
|---|---|---|---|---|---|---|
| Chrome | Edge | Firefox | Internet Explorer | Opera | Safari | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes |
| Mobile | |||||||
|---|---|---|---|---|---|---|---|
| Android webview | Chrome for Android | Edge Mobile | Firefox for Android | Opera for Android | iOS Safari | Samsung Internet | |
| Basic support | Yes | Yes | Yes | Yes | Yes | Yes | Yes |
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Licensed under the Creative Commons Attribution-ShareAlike License v2.5 or later.
https://developer.mozilla.org/en-US/docs/Web/HTTP/Headers/Content-Length