What is MIME type "model/u3d"?
A MIME type is a string that tells browsers and other tools how to handle a particular kind of file.
model/u3d is the media type for the Universal 3D (U3D) file format. It is defined under ECMA-363.
This type packages 3D geometry, textures, and shading data in a compact binary file.
- Embedding interactive 3D models in documents like PDFs
- Transferring and displaying complex 3D scenes in visualization and CAD tools
- Supporting real-time 3D rendering in various applications
Files of this type commonly use the extension U3D. This helps applications identify and process the 3D content.
For detailed standards information, visit ECMA International.
Associated file extensions
Usage Examples
HTTP Header
When serving content with this MIME type, set the Content-Type header:
Content-Type: model/u3d
HTML
In HTML, you can specify the MIME type in various elements:
<a href="file.dat" type="model/u3d">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', 'model/u3d');
res.end('Content here');
}).listen(3000);
Associated file extensions
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.