Is YAML a superset of JSON?

Practically yes — valid JSON is also valid YAML 1.2, which is why converting JSON to YAML always works, while YAML has extra features (comments, anchors) that don't survive the trip back to JSON.

Will comments be preserved?

No — JSON has no comment syntax, so YAML comments are dropped when converting to JSON.

JSON ⇄ YAML Converter

Convert between JSON and YAML in either direction with a single click. Perfect when a tool gives you JSON but your Kubernetes manifest, GitHub Actions workflow, or OpenAPI spec wants YAML — or vice versa. Parsing errors are reported clearly, and conversion preserves nesting, arrays, and data types.

Developer Tools

JSON → YAMLYAML → JSON

JSON input

YAML output

Private by default

This tool runs entirely in your browser. Your data is never uploaded to a server.

How to use

3 clear steps.

Pick the direction: JSON → YAML or YAML → JSON.
Paste the source document.
Fix any reported syntax errors, then copy the converted output.

Good to know

Frequently asked questions

Is YAML a superset of JSON?: Practically yes — valid JSON is also valid YAML 1.2, which is why converting JSON to YAML always works, while YAML has extra features (comments, anchors) that don't survive the trip back to JSON.
Will comments be preserved?: No — JSON has no comment syntax, so YAML comments are dropped when converting to JSON.