JSON to YAML Converter
Convert JSON to clean, readable YAML with 2 or 4 space indentation. Strings that YAML would misread (yes, no, 1.0, dates) are quoted automatically so the data round-trips.
How it works
JSON is a subset of YAML 1.2 in practice, so every JSON value has a YAML form. The converter picks block style for readability.
Strings that look like booleans, numbers, null or dates are quoted, so parsing the YAML back gives exactly the original JSON.
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Questions
Why are some strings quoted?
Without quotes, a YAML parser would read values like "yes", "1.0" or "2024-01-01" as a boolean, number or date. Quoting keeps them strings.
Can I get flow style ({ a: 1 })?
Block style is used because it is what humans edit in config files. Valid JSON is also valid YAML if you need flow style.
Is my JSON sent to a server?
No. Conversion happens in your browser. The only network request is the optional AI explanation when your input has an error and you ask for it.