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JSON to YAML Converter

Developer Tools

Paste JSON and get clean YAML instantly — pick 2 or 4 space indent, keep the original key order or sort keys, all inside your browser.

Your inputs

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Paste an object or array. Comments and trailing commas are not valid JSON.

Result

YAML output —
  • Total keys —
  • Lines —
  • Max depth —

Change any input and the result updates instantly.

Formula and rules

  • Objects become "key: value" pairs; arrays become "- item" lines.
  • Indentation increases one level per nested object or array, using 2 or 4 spaces as selected.
  • Strings that look like numbers, booleans or null are quoted so YAML keeps them as text.
  • Strings with line breaks or leading/trailing spaces are wrapped in double quotes.
  • Empty objects become {} and empty arrays become [].

Worked examples

Flat object

Input {"name":"Uslik","tools":21,"free":true}

Result name: Uslik tools: 21 free: true

Array of strings

Input {"tags":["seo","tools","calculators"]}

Result tags: - seo - tools - calculators

Array of objects

Input {"items":[{"id":1,"ok":true},{"id":2,"ok":false}]}

Result items: - id: 1 ok: true - id: 2 ok: false

FAQ

Is my JSON uploaded anywhere?

No. The conversion runs entirely in your browser with JavaScript. Closing the tab clears the data, and nothing is sent to a server.

Why are some strings wrapped in quotes?

YAML treats values like 123, true or null as numbers and booleans. Quoting them keeps them as text, so a postal code or version number does not turn into a number.

Does it support comments, anchors or multi-document YAML?

JSON has no comments, anchors or documents, so the output is a single YAML document without them. Nested objects, arrays and scalar types are fully supported.

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Disclaimer: Results follow the formula shown on this page and are for reference only. Real-world quantities vary with materials, technique and conditions, so allow a margin before ordering.