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YAML to JSON Converter — Free Online Tool
Convert common YAML mappings, nested lists and scalar values into copyable JSON using local browser parsing.
JavaScript is needed for the interactive tool. The formula and worked example remain available below.
How to use the YAML to JSON Converter
Convert common YAML mappings, nested lists and scalar values into copyable JSON using local browser parsing.
- Enter real measurements or prices in the interactive tool.
- Check unit labels and customize any applicable fees, waste allowances or product-specific rates.
- Review the result, formulas and limitations before using it in purchasing, pricing or production decisions.
YAML to JSON Converter: formula & methodology
Mapping pairs become JSON object keys; dash-prefixed lists become arrays; simple booleans, numbers, nulls and strings map to matching JSON values.
The tool uses your entered values and explicitly labeled assumptions. Final results may be rounded for display, while intermediate arithmetic retains available numeric precision. Verify material, tax, device or platform specifications relevant to your situation.
Worked example
The YAML lines name: Solvory and active: true convert to a JSON object with a string name and boolean active.
Try the example above and then change values to reflect your own project or comparison.
Frequently asked questions
Does it support all YAML 1.2 syntax?
No. Anchors, aliases, block scalars, complex keys, custom tags and multi-document streams are not supported.
Does this parse full YAML 1.2?
No. This restricted browser parser supports common indented maps and lists but excludes advanced syntax.
What happens with duplicate mapping keys?
It reports a duplicate-key error instead of silently overwriting values.