The Accept-Ranges response HTTP header is a marker used
by the server to advertise its support of partial requests. The value of this field
indicates the unit that can be used to define a range.
In presence of an Accept-Ranges header, the browser may try to
resume an interrupted download, rather than to start it from the start again.
| Header type | Response header |
|---|---|
| Forbidden header name | no |
Syntax
Accept-Ranges: <range-unit>
Accept-Ranges: noneDirectives
<range-unit>- Defines the range unit the server supports. Though
bytesis the only range unit formally defined by RFC 7233, additional range units may be registered in the HTTP Range Unit Registry. none- No range unit is supported, this makes the header equivalent of its own absence and is therefore rarely used, though some browsers, like IE9, it is used to disable or remove the pause buttons in the download manager.
Examples
Accept-Ranges: bytes
Specifications
| Specification | Title |
|---|---|
| RFC 7233, section 2.3: Accept-Ranges | Hypertext Transfer Protocol (HTTP/1.1): Range Requests |
Browser compatibility
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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.