What is MIME type "application/x-dfont"?

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

application/x-dfont is a MIME type that marks a file as a Datafork TrueType font container.
Files of this type hold font data and are mainly used on Mac systems.
They come in files with the DFONT extension.

This format bundles the actual font outlines, metrics, and extra information into one package.
It often includes several variations of a font, such as weight or style, within a single file.

• Utilized on Mac platforms for effective font resource management.
• Supports multiple font styles gathered in one container.
• Ensures proper rendering and scaling of text in applications.
• Relies on older resource fork methods familiar to macOS.

For more details on similar font technologies, check out the TrueType standard.

Associated file extensions

.dfont

Usage Examples

HTTP Header

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

    Content-Type: application/x-dfont    
  

HTML

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

    <a href="file.dat" type="application/x-dfont">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', 'application/x-dfont');    
      res.end('Content here');    
    }).listen(3000);    
  

Associated file extensions

.dfont