Content-Range

Baseline Widely available

This feature is well established and works across many devices and browser versions. It’s been available across browsers since July 2015.

The HTTP Content-Range response header is used in range requests to indicate where the content of a response body belongs in relation to a complete resource.

Header type	Response header, Content header
Forbidden header name	No
CORS-safelisted request header	No

Syntax

http

Content-Range: <unit> <range-start>-<range-end>/<size>
Content-Range: <unit> <range-start>-<range-end>/*
Content-Range: <unit> */<size>

Directives

<unit>: The unit for specifying ranges. Currently, only bytes is supported.
<range-start>: An integer in the given unit indicating the start position (zero-indexed & inclusive) of the request range.
<range-end>: An integer in the given unit indicating the end position (zero-indexed & inclusive) of the requested range.
<size>: The total length of the document (or * if unknown).

Examples

http

Content-Range: bytes 200-1000/67589

Specifications

Specification
HTTP Semantics # field.content-range

Browser compatibility

BCD tables only load in the browser