Free YAML to JSON & JSON to YAML Converter Tool Online
Convert YAML and JSON instantly while preserving data structure and formatting. Great for configuration files, APIs, and development workflows.
IN: YAML or JSON · OUT: JSON or YAML · RUNS: 100% in your browser
{
"name": "freedevelopertools",
"free": true,
"categories": [
"text",
"encoding",
"color"
]
}Frequently asked questions
Why would I convert YAML to JSON?+
JSON is often required by APIs, scripts, or tools that don't understand YAML directly, so converting lets you take a YAML config file (like a Kubernetes manifest or CI pipeline) and use it wherever strict JSON is expected.
Does this support YAML anchors and aliases?+
Yes, the underlying YAML parser resolves standard YAML anchors (&) and aliases (*), expanding them into their full values in the resulting JSON.
Will converting JSON to YAML preserve comments?+
No, JSON has no concept of comments, so if your original YAML had comments and you round-trip it through JSON, those comments will be lost. Only convert JSON to YAML for data that doesn't rely on comments.
What YAML version does this support?+
It supports YAML 1.1/1.2 style syntax as implemented by the popular js-yaml library, covering the vast majority of real-world YAML files including nested mappings, sequences, and multi-line strings.
Is my configuration data sent to a server?+
No, conversion happens entirely client-side in your browser — this matters especially for YAML since it's often used for infrastructure and deployment configs that may contain sensitive values.
Why did my conversion fail with an indentation error?+
YAML is whitespace-sensitive, so inconsistent indentation (mixing tabs and spaces, or misaligned nested keys) is the most common cause of parse errors — check that indentation is consistent throughout.