What is MIME type "application/x-vnd.corel.designer.document+zip"?

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

application/x-vnd.corel.designer.document+zip is the MIME type used for Corel Designer documents.
It wraps a design project in a compressed archive using the ZIP standard. This allows for all design elements—such as vector graphics, text, embedded images, and layout data—to be stored together efficiently.
Files using this format are identified by the DES file extension.
Main uses:

Combining multiple design resources into one compressed package
Storing layered vector artwork and complex page layouts
Facilitating file sharing in professional design workflows
Embedding necessary assets (images, fonts, styles) to maintain document integrity

This MIME type supports the efficient exchange and management of intricate design projects. For further reading, visit Corel's website.

Associated file extensions

.des

Usage Examples

HTTP Header

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


    Content-Type: application/x-vnd.corel.designer.document+zip

HTML

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


    <a href="file.dat" type="application/x-vnd.corel.designer.document+zip">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-vnd.corel.designer.document+zip');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.des

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.