Is the JSON to YAML converter free?

Yes, completely free with no signup required.

Is my JSON uploaded during conversion?

No. The js-yaml library runs entirely in your browser tab — the data you paste is converted locally and never transmitted.

Are all JSON types supported?

Yes. Strings, numbers, booleans, null, arrays, and nested objects are all converted to their YAML equivalents.

Does JSON null become YAML null?

Yes. JSON null converts to YAML null (represented as ~). JSON booleans become YAML true/false.

Can I control YAML output style?

The tool produces block-style YAML by default, which is the most readable format. Use the indent selector to choose 2 or 4 spaces.

Dev Tools

JSON to YAML Converter Online Free

Convert JSON to YAML in real time. Handles nested objects, arrays, and all JSON types. Browser-based.

Files never storedInstantNo signup

🔒 Your file never leaves your browser. Conversion uses js-yaml locally.

YAML indent:

JSON Input

YAML Output

name: John Doe
age: 30
address:
  street: 123 Main St
  city: Springfield
  country: USA
hobbies:
  - reading
  - cycling
  - coding
active: true

How to Convert JSON to YAML Online

1
Paste your JSON
Paste valid JSON into the input box.
2
View the YAML output
The converted YAML appears instantly. The tool validates your JSON and shows an error if it is malformed.
3
Copy the YAML
Click Copy to copy the YAML to your clipboard.

JSON and YAML describe the same data model — mappings, sequences, scalars — but they are optimised for different readers. JSON is built for machines: strict quoting, no comments, unambiguous parsing. YAML is built for humans editing configuration by hand: indentation instead of braces, optional quotes, and comment support. Converting JSON to YAML is most often the first step in turning an API response or a generated config into something maintainable.

Typical uses: converting a JSON config into a Kubernetes manifest, docker-compose file, GitHub Actions workflow, or Ansible playbook — ecosystems that standardised on YAML. Also handy for making large JSON payloads reviewable in a pull request, since YAML diffs line-by-line more cleanly than single-line JSON.

What changes in translation: braces and brackets become indentation, keys lose their quotes where safe, null becomes ~, and nesting is expressed purely through whitespace. Nothing is lost — the conversion is fully reversible with the YAML to JSON converter — but be aware that YAML's readability comes with indentation-sensitivity: a re-indented line changes meaning in YAML where it would not in JSON.

Validation first: the converter parses your JSON before emitting YAML, so malformed input fails with a clear error instead of producing a broken file. If you only need to clean up JSON without converting it, use the JSON formatter.

Frequently Asked Questions

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