What is MIME type "video/webm"?

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

The MIME type video/webm is used for web video files that work directly in browsers.
It delivers compressed video and audio streams for efficient, high-quality playback.

Web Integration: Plays natively in HTML5 video tags with minimal setup.
Efficient Compression: Employs codecs like VP8/VP9 for video and Vorbis/Opus for audio.
Open Format: Free to use and supported by modern browsers such as Chrome, Firefox, and Opera.

Files that use this MIME type typically have the WEBM extension.
For further technical details, see the documentation on the MDN Web Docs or visit the Wikipedia page on WebM.

Associated file extensions

.webm

Usage Examples

HTTP Header

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


    Content-Type: video/webm

HTML

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


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

Associated file extensions

.webm

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.