Convert JSON to YAML online: tool and examples
Convert your JSON to YAML for your Kubernetes, Docker Compose or GitHub Actions configuration files.
Published on January 12, 2026YAML is the reference configuration format for modern DevOps tools: Kubernetes, Docker Compose, GitHub Actions, Ansible and many others. Converting JSON to YAML allows you to go from a verbose format to a readable and clean format.
Understanding the conversion
YAML is a superset of JSON (all valid JSON is valid YAML), but YAML uses indentation instead of braces and brackets, and removes quotes around simple strings. The conversion is deterministic: JSON objects become YAML indented blocks, JSON arrays become dash-prefixed lists, primitive values are preserved.
📊 Conversion table
| JSON | Equivalent YAML |
|---|---|
| {"name": "Alice"} | name: Alice |
| {"port": 8080} | port: 8080 |
| {"debug": true} | debug: true |
| ["a", "b", "c"] | - a - b - c |
| {"db": {"host": "localhost"}} | db: host: localhost |
💡 Practical examples
You have a JSON describing your Docker services. Convert it to YAML to get a valid docker-compose.yml file ready to use.
Kubernetes manifests (Deployment, Service, ConfigMap) are in YAML. Build your structure in JSON, convert and copy into your .yaml file.
A JSON API response with many levels of nesting is often more readable once converted to YAML for human review.