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JSON → YAML Converter

Convert JSON to YAML format instantly — using js-yaml, entirely in your browser.

Runs 100% in your browser — nothing is uploaded

About this tool

The JSON to YAML converter parses your JSON and outputs equivalent YAML. YAML is a superset of JSON with a more human-readable indented syntax, widely used in Docker Compose, Kubernetes manifests, GitHub Actions workflows, and CI/CD configuration files.

The conversion uses the js-yaml library loaded in your browser — no server involved. Nested objects, arrays, strings, numbers, booleans, and null values are all handled correctly. The output uses standard YAML block style (indented, not flow style) for maximum readability.

Frequently asked questions

Is YAML a superset of JSON?
YAML 1.2 is a strict superset of JSON — every valid JSON document is also valid YAML. The reverse is not true: YAML has features (comments, anchors, complex keys) not present in JSON.
Can I convert YAML back to JSON?
Yes — use the YAML to JSON tool. The conversion is lossless for basic types; YAML-specific features like anchors and aliases are expanded during conversion.

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