CaseWren

JSON to YAML Converter

Turn JSON into readable YAML — and back again.

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About the JSON to YAML Converter

YAML is JSON's human-friendly sibling — the format of Kubernetes manifests, GitHub Actions, Docker Compose and Ansible playbooks. Paste JSON and get clean, two-space-indented YAML; paste YAML and get pretty-printed JSON back, with strings, numbers, booleans and null preserved.

The YAML reader covers the everyday subset — nested maps, dash lists, scalars and # comments — which is what the vast majority of real-world config files use. Anything exotic, like anchors or multiline block scalars, raises a clear "unsupported feature" error instead of a silently wrong answer.

How to use it

  1. 1Paste JSON to see the YAML output.
  2. 2Or paste YAML (maps, lists, scalars) to see the JSON output.
  3. 3Copy either side — conversion errors are shown inline.

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