application/multipart-core is a application media type.
Quick facts
What is application/multipart-core
application/multipart-core is one of the application media types used on the internet. When serving this content over HTTP, set the Content-Type header in the response, for example:
Content-Type: application/multipart-core
Relation chain
Related MIME types
Used with
Related headers
Related methods
Frequently asked questions
application/multipart-core is a application media type used to identify a content format; servers announce it to clients with the Content-Type header.
Extensions such as none registered are associated with this MIME type.
Send Content-Type: application/multipart-core in the HTTP response.
Sources & standards
Updated 2026-08-18
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