lookup> application/vnd.ms-htmlhelp

application/vnd.ms-htmlhelp

application/vnd.ms-htmlhelp is a application media type commonly associated with .chm extensions.

applicationContent-Type

Quick facts

MIME typeapplication/vnd.ms-htmlhelp

Extensions.chm

Charset—

Compressible—

Sourceiana

What is application/vnd.ms-htmlhelp

application/vnd.ms-htmlhelp

application/vnd.ms-htmlhelp 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/vnd.ms-htmlhelp

Related entities: associated extensions include .chm, and is delivered over HTTP via the Content-Type header, commonly with GET, POST, PUT and PATCH requests.

Related formats:

CHM Document

Relation chain

.chmserved as

mime type

application/vnd.ms-htmlhelpsent via header

http header

Content-Type

Related extensions

.chm

CHM Document

Related MIME types

application/1d-interleaved-parityfec application/3gpdash-qoe-report+xml application/3gpp-ims+xml application/3gpp-mbs-object-manifest+json

Used with

application/vnd.ms-htmlhelp is identified in HTTP by the Content-Type header and is commonly used with these methods:

Related headers

Related methods

Frequently asked questions

What is application/vnd.ms-htmlhelp?

application/vnd.ms-htmlhelp is a application media type used to identify a content format; servers announce it to clients with the Content-Type header.

Which file extensions use application/vnd.ms-htmlhelp?

Extensions such as .chm are associated with this MIME type.

How do I set the Content-Type for application/vnd.ms-htmlhelp?

Send Content-Type: application/vnd.ms-htmlhelp in the HTTP response.

Sources & standards

Updated 2026-08-18

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