About MIME types

The

Accept

and

Content-Type

headers use MIME types to specify the type of message content.

There are basic MIME types for simple files and web formats:

text/plain

,

text/html

,

application/xml

,

application/json

,

application/octet-stream

,

text/css

,

text/javascript

...

There are MIME types for all known file formats:

image/jpeg

,

image/png

,

audio/mpeg

,

application/pdf

,

application/zip

,

font/woff

,

video/mp4

...

There are specific MIME types related to browsers and APIs:

multipart/mixed

,

multipart/form-data

,

multipart/byteranges

,

application/x-www-form-urlencoded

...

Sometimes, extra information are added to a type. Text format can have a charset specification:

text/plain;charset=UTF-8

See: RFC-2045, RFC-2046, RFC-2047, RFC-4288, RFC-4289, RFC-2049; and MDN: MIME type