The Accept-Ranges response HTTP header is a marker used by the server to advertise its support of partial request. The value of this field indicates the unit that can be used to define the 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


Accept-Ranges: bytes
Accept-Ranges: 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, uses it to disable or remove the pause buttons in their download managers.

Ranges can be expressed in bytes.


Accept-Ranges: bytes


Specification Title
RFC 7233, section 2.3: Accept-Ranges Hypertext Transfer Protocol (HTTP/1.1): Range Requests

Browser compatibility

File "http/headers/accept-ranges.json" not found or malformed.

See also

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 Contributors to this page: teoli, fscholz
 Last updated by: teoli,