What is MIME type "image/x-faxx"?

A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.

image/x-faxx is a non‐standard MIME type. It tags image files that use the specialized IFF‐FAXX format. This format is mainly for fax image data.

The x- prefix indicates a vendor-specific or experimental format. It is not a widely adopted modern standard. Specialized or legacy fax software may be required to display these files correctly.

Main purpose: To encapsulate fax image data within an IFF container.
Usage context: Seen in older or specialized fax processing systems.
Technical note: The format is experimental. Its support can vary by application.
File type: Files using this MIME type are linked with the FAXX extension.

For more on MIME types, check the IANA Media Types Reference.

Associated file extensions

.faxx

Usage Examples

HTTP Header

When serving content with this MIME type, set the Content-Type header:


    Content-Type: image/x-faxx

HTML

In HTML, you can specify the MIME type in various elements:


    <a href="file.dat" type="image/x-faxx">Download file</a>

Server-side (Node.js)

Setting the Content-Type header in Node.js:


    const http = require('http');
    
    http.createServer((req, res) => {
      res.setHeader('Content-Type', 'image/x-faxx');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.faxx

FAQ

What is a MIME type?

A MIME (Multipurpose Internet Mail Extensions) type is a standard that indicates the nature and format of a document, file, or assortment of bytes. MIME types are defined and standardized in IETF's RFC 6838.

MIME types are important because they help browsers and servers understand how to process a file. When a browser receives a file from a server, it uses the MIME type to determine how to display or handle the content, whether it's an image to display, a PDF to open in a viewer, or a video to play.

MIME types consist of a type and a subtype, separated by a slash (e.g., text/html, image/jpeg, application/pdf). Some MIME types also include optional parameters.

How do I find the MIME type for a file?

You can check the file extension or use a file identification tool such as file --mime-type on the command line. Many programming languages also provide libraries to detect MIME types.

Why are multiple MIME types listed for one extension?

Different applications and historical conventions may use alternative MIME identifiers for the same kind of file. Showing them all helps ensure compatibility across systems.