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A YAML or JSON document.
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YAML ↔ JSON converter
Move between readable configuration and strict structured data privately.
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What does yaml ↔ json converter do?
Parse YAML into two-space JSON or serialize a JSON value as YAML with two-space indentation and lines targeted to 100 characters. The output can be copied or downloaded in the selected format.
- Input
- A YAML or JSON document.
- Result
- Equivalent JSON or YAML text.
- Price
- Free
- Account
- Not required
How to use yaml ↔ json converter
Choose your settings
Move between readable configuration and strict structured data privately.
Save or copy
Equivalent JSON or YAML text.
A practical tip
Review anchors, aliases, custom tags, and date-like values when moving between formats.
When to use yaml ↔ json converter
Turn a small YAML configuration into JSON for a tool that accepts only JSON.
Produce readable YAML from a JSON object before editing deployment settings.
Check how scalar values and nested collections survive a format change.
Worked example
A concrete yaml ↔ json converter example
- Input
- project: TinyFreeTools private: true tools: - color - pdf
- Settings
- YAML to JSON
- Result
- The JSON output contains project as a string, private as boolean true, and tools as the array ["color", "pdf"], formatted with two-space indentation.
What to expect
How it works
YAML input is parsed with js-yaml and then passed to JSON.stringify(); empty YAML becomes JSON null. In the reverse direction, strict JSON.parse() creates a JavaScript value and js-yaml emits YAML with two-space indentation, a 100-character target width, and reference aliases disabled.
Know before using
Limits and edge cases
- Comments, original quoting, key order intent, anchors, aliases, and formatting style are not round-tripped as source text; conversion preserves the parsed data model, not presentation.
- YAML supports constructs and scalar semantics that JSON cannot represent directly. Custom tags or unusual values may fail, resolve unexpectedly, or become a less specific JSON value.
Standards and sources
Common questions
YAML ↔ JSON converter FAQ
Is yaml ↔ json converter free to use?
Yes. YAML ↔ JSON converter is free to use.
Does yaml ↔ json converter keep my work private?
Yes. Your work stays private while you use the tool — nothing you enter is uploaded.
Will YAML comments appear in the JSON output?
No. Comments are not part of the parsed data value, so they are discarded during YAML-to-JSON conversion.
Why does converted YAML look different from the original?
The serializer emits a fresh representation from parsed data. It does not retain the original spacing, quote choices, flow style, anchors, or line wrapping.