ApplicationText-based

`application/x-yaml`

YAML (Application)

Reference for application/x-yaml, an alternative MIME type for YAML configuration and data serialization files.

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Expected extensions: .yaml, .yml

HTTP Content-Type Header

HTTP Header

Content-Type: application/x-yaml; charset=utf-8

Associated File Extensions

.yaml.yml

Quick Facts

MIME Type	application/x-yaml
Category	Application
Type	Text-based (human-readable)
Extensions	.yaml, .yml

Common Usage

YAML is a human-readable data serialization format widely used for configuration files. It powers Kubernetes manifests, Docker Compose files, CI/CD pipelines (GitHub Actions, GitLab CI), Ansible playbooks, and many application configuration systems.

Code Examples

HTML

<!-- Link or embed with explicit type -->
<link rel="stylesheet" href="file.yaml" type="application/x-yaml">

<!-- Or for script/media elements -->
<script type="application/x-yaml" src="file.yaml"></script>

Node.js

// Express.js
app.get('/file', (req, res) => {
  res.type('application/x-yaml');
  res.send(data);
});

// Node.js http
res.writeHead(200, { 'Content-Type': 'application/x-yaml' });

nginx

# nginx.conf — add to types block or use default
types {
    application/x-yaml  yaml yml;
}

# Or set for a specific location
location /api/ {
    default_type application/x-yaml;
}