What is MIME type "application/x-cfs-compressed"?

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

application/x-cfs-compressed is a MIME type for files that use a Compact File Set format.
It indicates that the file is a compressed container designed to bundle multiple resources efficiently.

Compact Packaging: Groups several files into one archive. This helps reduce disk space and simplifies transfers.
Specialized Compression: Uses unique algorithms tuned for its specific data structure.
Application Scenarios: Useful in software distribution, backup solutions, and systems where quick decompression is essential.

Files of this type use the CFS extension.
The format is vendor-specific and may require compatible tools to decompress or manage the data reliably.
For more technical details, you can refer to the documentation available on specialized developer sites and standards pages such as IANA.

Associated file extensions

.cfs

Usage Examples

HTTP Header

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


    Content-Type: application/x-cfs-compressed

HTML

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


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

Associated file extensions

.cfs

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.