image/g3fax is a image media type commonly associated with .g3 extensions.
Quick facts
What is image/g3fax
image/g3fax is one of the image media types used on the internet. When serving this content over HTTP, set the Content-Type header in the response, for example:
Content-Type: image/g3fax
Related entities: associated extensions include .g3, and is delivered over HTTP via the Content-Type header, commonly with GET, POST, PUT and PATCH requests.
Related formats:
Relation chain
Related extensions
Related MIME types
Used with
Related headers
Related methods
Frequently asked questions
image/g3fax is a image media type used to identify a content format; servers announce it to clients with the Content-Type header.
Extensions such as .g3 are associated with this MIME type.
Send Content-Type: image/g3fax in the HTTP response.
Sources & standards
Updated 2026-08-18
Explore this reference