Accept-Ranges

The Accept-Ranges HTTP response header is a marker used by the server to advertise its support for partial requests from the client for file downloads. The value of this field indicates the unit that can be used to define a range.

In the presence of an Accept-Ranges header, the browser may try to resume an interrupted download instead of trying to restart the download.

Header type	Response header
Forbidden header name	no

Syntax

Accept-Ranges: <range-unit>
Accept-Ranges: none

Directives

<range-unit>: Defines the range unit that the server supports. Though bytes is the only range unit formally defined by RFC 7233, additional range units may be registered in the HTTP Range Unit Registry.
none: Indicates that no range unit is supported. This makes the header equivalent of its own absence and is therefore, rarely used. Although in some browsers, like IE9, this setting is used to disable or remove the pause buttons in the download manager.

Examples

Accept-Ranges: bytes

Specifications

Specification
Hypertext Transfer Protocol (HTTP/1.1): Range Requests (HTTP/1.1) # header.accept-ranges

Browser compatibility

	Desktop						Mobile
	Chrome	Edge	Firefox	Internet Explorer	Opera	Safari	WebView Android	Chrome Android	Firefox for Android	Opera Android	Safari on IOS	Samsung Internet
`Accept-Ranges`	Yes	12	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes	Yes

Accept-Ranges

Accept-Ranges

Syntax

Directives

Examples

Specifications

Browser compatibility

See also