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Tools / Data & JSON

JSON ↔ YAML Converter

Convert JSON to YAML and YAML to JSON in the browser with validation, clear errors and download options. No server upload.

Uses YAML 1.2. Only JSON-compatible YAML data can be converted; custom tags, dates and aliases are rejected.

Everything runs locally in your browser.

What is JSON ↔ YAML Converter?

JSON and YAML are common configuration and data serialization formats. This converter supports JSON-compatible YAML 1.2 data and preserves nested objects and arrays. YAML supports additional types and aliases that do not map directly to JSON; unsupported structures are rejected rather than silently converted.

How to use this tool

  1. Choose JSON → YAML or YAML → JSON.
  2. Paste your source data and convert locally in the browser.
  3. Copy the result or download a .yaml or .json file.

Example

JSON: {"name":"Ada","active":true} → YAML: name: Ada

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