What is MIME type "image/vnd.djvu"?

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

image/vnd.djvu labels files that use the DJVU format for images and scanned documents.

This format is built for high-quality scans with efficient compression. It separates text, line art, and background images into layers. This separation allows smaller file sizes while retaining detail.

Its main use is in archiving scanned books, technical manuals, and historical documents where file size is crucial but clarity must be preserved.

Key details:

Compression Efficiency: Maintains image quality with reduced size.
Layered Image Structure: Separates elements into layers for sharper text and images.
Use Cases: Digital libraries, document archiving, and distribution of scanned materials.

Files using this MIME type include formats such as DJVU and DJV.

For further technical details, check out Wikipedia.

Associated file extensions

.djvu, .djv

Usage Examples

HTTP Header

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


    Content-Type: image/vnd.djvu

HTML

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


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

Associated file extensions

.djvu, .djv

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.