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

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

text/x-yaml is a MIME type for files using the YAML format. YAML stands for "YAML Ain't Markup Language." It is plain text and relies on whitespace and indentation to show structure.

YAML is used to serialize data. Its syntax makes the data easy to read and edit. This is why many tools use it to store settings, configuration details, and asset information.

Main Use Cases:
Files using this MIME type come in many forms. Standard YAML files use formats such as YML and YAML. Other file names include those for game assets like MAT, ASSET, META, ANIM, and UNITY. Scripting and specialized languages also rely on YAML, seen in extensions like DSC, CWL, SLS and others such as MIR, MASK, PREFAB, KSY, LKML, LOOKML, RAML, REEK, RVIZ, SUBLIME-SYNTAX, SYNTAX, YAML-TMLANGUAGE, YAML.SED, and YML.MYSQL.

The clear structure and human-readable style of YAML make it a popular choice among developers and system administrators. For more details on YAML, visit the YAML official site.

Associated file extensions

.yml, .yaml, .mat, .asset, .meta, .anim, .dsc, .cwl, .unity, .sls, .mir, .mask, .prefab, .ksy, .lkml, .lookml, .raml, .reek, .rviz, .sublime-syntax, .syntax, .yaml-tmlanguage, .yaml.sed, .yml.mysql

Usage Examples

HTTP Header

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


    Content-Type: text/x-yaml
  

HTML

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


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

Associated file extensions

.yml, .yaml, .mat, .asset, .meta, .anim, .dsc, .cwl, .unity, .sls, .mir, .mask, .prefab, .ksy, .lkml, .lookml, .raml, .reek, .rviz, .sublime-syntax, .syntax, .yaml-tmlanguage, .yaml.sed, .yml.mysql

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.