What is MIME type "application/x-acad"?

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

application/x-acad is a MIME type for computer-aided design files. It signals that the file contains drawing data created in AutoCAD environments.
This type tells programs how to handle these files during transfers or when opening them.

Main use: Storing detailed 2D or 3D drawings and design data.
Usage: Commonly recognized by AutoCAD and compatible design software.
Content: Holds geometry, annotations, and layout information vital for technical projects.
System behavior: Helps operating systems identify the proper application for viewing or editing.

Files using this MIME type include drawings and templates, such as DWG files and template files like DWT.
For more technical details on MIME types, visit this resource.

Associated file extensions

.dwg, .dwt

Usage Examples

HTTP Header

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


    Content-Type: application/x-acad

HTML

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


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

Associated file extensions

.dwg, .dwt

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.