What is MIME type "text/x-diff"?

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

The MIME type text/x-diff designates a plain text format that records differences between two files. Its content shows which lines have been added, removed, or changed. Lines beginning with symbols like "+" and "-" highlight these modifications.
This format is essential when you compare file versions.

It is used mainly to review and apply changes in software or text documents. For instance, tools that generate changes can output files for use with the PATCH command. Diff outputs are also saved in files with the DIFF extension.

• Software Maintenance: Quick visual review of differences in code or documents.
• Version Control: Supports tracking and merging code changes.
• Automated Patching: Feeds changes directly into update processes.

Its simple structure makes it readable with any text editor. This ease-of-use has made it a common tool in collaborative environments.

For more details, refer to Diff on Wikipedia.

Associated file extensions

.patch, .diff

Usage Examples

HTTP Header

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

    Content-Type: text/x-diff
  

HTML

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

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

Associated file extensions

.patch, .diff