What is MIME type "application/vnd.openxmlformats-officedocument.presentationml.slideshow"?

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.openxmlformats-officedocument.presentationml.slideshow represents files that are formatted for slide-based presentations. It is part of the Office Open XML standard used by modern productivity suites. When you open a file with this type, it starts in slideshow mode without entering an editing interface.

Files like PPTX and PPSX use this MIME type. The files are packaged in a compressed format and store slide data, media, and animations in XML. This makes them easy to share, secure, and compatible with multiple platforms.

Slide Delivery: Opens directly in presentation mode for instant viewing.
Media Integration: Supports images, audio, video, and animations within slides.
File Efficiency: Uses compression, which keeps file sizes smaller.
Cross-Platform Compatibility: Works reliably across different operating systems.

This MIME type is ideal when you want the file to serve as a self-contained show. It is widely used for lectures, business meetings, and automated displays. For further details about the underlying format, visit Office Open XML.

Associated file extensions

.pptx, .ppsx

Usage Examples

HTTP Header

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


    Content-Type: application/vnd.openxmlformats-officedocument.presentationml.slideshow

HTML

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


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

Associated file extensions

.pptx, .ppsx

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.