What is MIME type "text/x-spreadsheet"?

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

The MIME type text/x-spreadsheet identifies plain text files that are organized in a grid-like (tabular) structure. This format lets a file hold data in rows and columns without complex formatting, making it easy to edit with simple text editors.
It is non-standard and mostly used by specialized tools rather than general-purpose spreadsheet applications.
For example, LTspice uses this format for its symbol files. The file extension ASY indicates a text-based LTspice symbol. This file stores layout details and component data in an easily reworkable format.

Main use: Storing and editing structured, tabular data in plain text.
Key function: Allows simple modification and parsing without the need for proprietary software.
Additional use: Employed by niche tools like LTspice for defining component symbols and schematic information.

For further details on file extensions and similar MIME types, visit Filext.com.

Associated file extensions

.asy

Usage Examples

HTTP Header

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


    Content-Type: text/x-spreadsheet

HTML

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


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

Associated file extensions

.asy

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.