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About YAML JSON Converter Online

This tool converts between YAML and JSON in both directions. YAML is preferred for human-edited config (Kubernetes manifests, CI pipelines, Ansible playbooks); JSON is preferred for machine-to-machine transport. The converter bridges the two without losing data.

Both formats represent the same data model — nested objects, arrays, strings, numbers, booleans, null — so conversions are lossless. The tool preserves comments where the target format supports them, and lets you choose indentation, key sorting, and other formatting options.

Useful when adapting a YAML config for an API that expects JSON, generating sample YAML from a JSON schema test fixture, or just visualizing a complex configuration in your preferred format.

How to use this tool

How to convert between YAML and JSON

  1. Paste your input

    Drop YAML or JSON text into the "Input" field. The tool parses it according to the direction you pick — no auto-detection.

  2. Pick the direction

    "Direction" toggles `yaml_to_json` (parse YAML, emit JSON with 2-space indent) or `json_to_yaml` (parse JSON, emit YAML at lineWidth 100). Default is yaml_to_json.

  3. Press Run

    Result returns `output` (the converted text) and `format` (the emitted format: `json` or `yaml`). The two are kept separate so your renderer can pick the right syntax highlighter.

  4. Round-trip caveats

    YAML comments are lost on the first pass through JSON; key order in objects can shift; YAML tagged types (e.g. `!!set`) collapse to plain JSON shapes. For lossless YAML edits, use yaml-formatter-online instead.

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