Media Type Registry

This registry lists the non-JSON media types addressed by the OpenAPI Specification (OAS), and links to the appropriate OAS sections and external specifications. See Parsing and Serializing for a discussion of serialized, schema-ready, and application forms of data, and how to convert among the forms.

Specification Versions

This registry is for and linked from version 3.2 and later of the OAS. Earlier versions and other specifications such as Arazzo MAY support approaches added in this registry, as long as the necessary Objects and fields are available in those versions.

Contributing

Please open a discussion explaining your use cases for any media type(s) you would like to see added.

Media Types

Note: Media types with a structured suffix are handled the same way as the media type corresponding to the suffix (e.g. all +json media types are handled as application/json).

Group	Description	Media Types
Binary	Non-text-based media types	application/octet-stream audio/* image/* video/* any unrecognized binary media type
Forms	Ordered name-value pairs	application/x-www-form-urlencoded multipart/form-data
Link Sets	Sets of RFC8288 Web Links	application/linkset application/linkset+json
Sequential JSON	Multiple concatenated JSON documents suitable for streaming	application/jsonl application/json-seq application/x-ndjson
Sequential Multipart	Multipart subtypes with unnamed parts	multipart/* multipart/mixed multipart/alternative multipart/related multipart/byteranges
Server-Sent Events	Event streams for SSE	text/event-stream
Text	Text-based media types	text/* text/plain any unrecognized text-based (not just text/*) media type
XML	Extensible markup language	application/xml