YAML → JSON

Parse YAML and emit pretty-printed JSON.

Private by design. Your input never leaves this browser. Conversions run locally on your device.

What this tool handles

Dates in the YAML document become ISO 8601 strings.
NaN and Infinity become null.
Tabs used for indentation are rejected, and the error carries the line and column.
Multi-document YAML is not supported; one document per conversion.

name: Ada
active: true
ports:
  - 80
  - 443

{
  "name": "Ada",
  "active": true,
  "ports": [
    80,
    443
  ]
}

JSON → YAML — Convert JSON to readable YAML with configurable indentation.
Convert any format — Pick an input format and an output format and convert between any pair.
JSON → TOML — Convert a JSON object to TOML.
TOML → JSON — Parse TOML configuration into JSON.
JSON → CSV — Turn an array of objects into a CSV table.
CSV → JSON — Parse CSV or TSV into JSON, with delimiter detection and optional type coercion.