YAML to JSON converter

• Indent with spaces, never tabs.
• A colon needs a space after it: key: value, not key:value.
• Unquoted yes, no, on and off are true or false in older YAML (1.1) tools, and NO can turn Norway’s country code into false. Quote them to be safe.
• Leading zeros and version numbers such as 1.10 can become numbers: quote "1.10" to keep it as text.

A file with --- between parts holds several YAML documents (common in Kubernetes). They come out as a JSON list, one entry per document.

1. Pick YAML → JSON or JSON → YAML.
2. Paste or open the file.
3. Copy or download the result, or fix the line the error points to.

Is YAML a superset of JSON?

Almost: valid JSON is valid YAML 1.2, so JSON → YAML always works, and YAML that only uses JSON’s types converts back cleanly.

What happens to comments?

They’re dropped: JSON has no comments, so YAML → JSON can’t keep them.

Is my file uploaded?

No. It’s converted in your browser with the open-source js-yaml library.