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JSON to YAML

Conversion

Free online JSON to YAML converter. Paste JSON and get clean YAML with customizable indent and flow mode. No data uploaded - runs entirely in your browser.

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Quick answers for JSON to YAML

How is the YAML output formatted?
YAML output uses 2-space indentation, no document markers, and 80-character line width - the defaults for js-yaml and the format most teams use for config files. JSON-style strings stay quoted only where YAML requires it.
Does the converter handle nested arrays and objects?
Yes. Arbitrarily nested JSON structures convert cleanly into YAML's indentation-based format. Round-trip back to JSON via the Swap button to verify nothing was lost.
What happens to JSON null and booleans in YAML?
They convert to YAML's native null, true, and false literals. Strings that happen to look like those keywords are quoted automatically to avoid ambiguity.
Can I convert YAML back to JSON?
Yes - switch the direction tab. The same parser handles both directions, so you can round-trip data without losing structure.
Is my JSON uploaded anywhere?
No. Conversion happens entirely in your browser, so configuration that contains internal hostnames or secrets stays on your device.