What is MIME type "application/vnd.picsel"?

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

The MIME type application/vnd.picsel is a vendor-specific format. It tells software that the file was created using the Picsel system. This means the file contains data arranged in a unique way, often to support multimedia or layout details.
Files with this MIME type must be processed by applications designed for it. Typically, they store structured information such as images or presentation data. They are not handled correctly by general-purpose programs. For example, a file with the extension EFIF is expected to be interpreted in this way.

Vendor-specific format – Tied to the Picsel system.
Specialized data storage – Can include images, layouts, and other multimedia elements.
Requires dedicated applications – Only specific software can open or edit these files.
Optimized for targeted use cases – Ensures efficient rendering of complex content.

Using files of this type outside their intended ecosystem may lead to compatibility issues. For more details on the file extension, visit the link provided above.

Associated file extensions

.efif

Usage Examples

HTTP Header

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


    Content-Type: application/vnd.picsel

HTML

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


    <a href="file.dat" type="application/vnd.picsel">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/vnd.picsel');
      res.end('Content here');
    }).listen(3000);

Associated file extensions

.efif

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.