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

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

The MIME type application/x-openscad defines the format for files used by OpenSCAD, a script-based 3D CAD modeler.

Files in this format store design instructions as plain text. They describe 3D shapes, transformations, and geometric operations. This text-based approach makes them easy to edit and share.

Main use case:

Creating and customizing 3D models via scripted designs.

Other use cases:

Learning parametric design and coding in a CAD environment.
Rapid prototyping for 3D printing projects.
Collaborative design and sharing of model algorithms.

Files using this MIME type have the SCAD extension. They can be viewed in any text editor or directly within the OpenSCAD application.

For further details on the OpenSCAD tool, visit OpenSCAD's official site.

Associated file extensions

.scad

Usage Examples

HTTP Header

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


    Content-Type: application/x-openscad

HTML

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


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

Associated file extensions

.scad

FAQs

What application is associated with application/x-openscad?

This MIME type is primarily associated with OpenSCAD, a software for creating solid 3D CAD objects. Since the files are plain text scripts, they can also be opened and edited in code editors like VS Code or generic text editors such as Notepad.

How do I configure my web server to serve .scad files?

For Apache servers, add the line AddType application/x-openscad .scad to your .htaccess or config file. For Nginx, include application/x-openscad scad; within the types { } block of your configuration.

Can web browsers render application/x-openscad files natively?

No, standard web browsers (Chrome, Firefox, Edge) cannot render OpenSCAD scripts directly and will usually prompt to download the file. To display these 3D models on a webpage, you must use a JavaScript library like OpenJSCAD to parse and render the content.

Is application/x-openscad binary or plain text?

It is a plain text format. This allows users to track changes easily using version control systems like Git, making it distinct from binary CAD formats which are harder to diff and merge.

What is the difference between application/x-openscad and model/stl?

Files with application/x-openscad contain the source code (parametric instructions) to generate a model. In contrast, model/stl files contain the compiled surface geometry (mesh) used for slicing and 3D printing.

Why does the MIME type start with x-?

The prefix x- indicates that application/x-openscad is a non-standard or experimental type not officially registered with the IANA. However, it is the widely accepted convention for identifying SCAD files on the web.

Are there security risks associated with this MIME type?

Generally, these files are safe because they are text-based descriptions of geometry. However, because they are essentially scripts executed by the OpenSCAD engine, you should treat files from untrusted sources with caution, although OpenSCAD is designed to be sandboxed.

General 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.