What is MIME type "video/x-jng"?

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

The video/x-jng MIME type identifies files using the JNG format. It was defined as part of the MNG (Multiple-image Network Graphics) suite.

Despite the “video” prefix, this type handles still images. The format combines JPEG-style compression for color data with lossless methods for the alpha channel. This mix supports high-quality graphics with smooth transparency.

Main use: Display high-quality images with transparent areas.
Component in animation containers where still images play a role.
Facilitates blending lossy and lossless compression techniques.

This MIME type is mostly seen in specialized multimedia projects and legacy systems. For more details, visit MNG on Wikipedia.

Associated file extensions

.jng

Usage Examples

HTTP Header

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


    Content-Type: video/x-jng

HTML

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


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

Associated file extensions

.jng

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.