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YAML ↔ JSON Converter

Convert YAML to JSON and back, live as you type. Validation reports the exact line and column of any syntax error, multi-document YAML files become JSON arrays, and the output respects your indentation and key-sorting preferences — all in your browser.

How to use YAML ↔ JSON Converter

  1. Pick the direction (YAML → JSON or JSON → YAML) and paste your document — conversion is instant.
  2. Adjust the indent (2/4 spaces, or minified JSON) and toggle key sorting if you want stable ordering.
  3. Copy the result, or hit Swap to feed the output back in the opposite direction.

Frequently asked questions

How do I convert YAML to JSON?
Set the direction to YAML → JSON and paste your YAML; the JSON appears live, with the exact line and column flagged for any syntax error.
How do I convert JSON to YAML?
Pick JSON → YAML (or hit Swap), paste your JSON, and copy the YAML output at your chosen indentation.
Is my configuration uploaded anywhere?
No — js-yaml runs entirely in your browser, so secrets in your config files never leave your device.
What happens to YAML comments and anchors?
Anchors and aliases are resolved into their actual values. Comments are dropped — JSON has no comment syntax to carry them.
Does it support multi-document YAML files?
Yes — documents separated by --- are converted into a JSON array, with a note telling you how many were found.
How are syntax errors reported?
YAML errors include the exact line and column from the parser; JSON errors surface the position from the engine — so you can jump straight to the problem.

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