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// http header · request header

Accept-Language

Preferred natural languages

What the Accept-Language header does

Accept-Language states the natural languages the user prefers, with quality weights. A server that supports localisation uses it to choose which translation to return, and it's echoed by Vary: Accept-Language so caches keep language variants separate.

Example

Accept-Language: en-US,en;q=0.9

Where it's used

Accept-Language is a request header. Request headers are sent by the client to describe the request and what the client can accept.

Other request headers

Accept Accept-Encoding Accept-Language Authorization Content-Type Content-Length Cookie Host Origin Referer User-Agent If-None-Match Range
TOOL

HTTP Headers Parser

Turn a block of raw headers into readable JSON.

REFERENCE

All HTTP Headers

Common request, response, caching, CORS, and security headers.

GUIDE

How to Read and Parse HTTP Headers

The anatomy of headers and how to work with them.