YML JSON
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Convert YML to JSON

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YML to JSON converterFREE
Drop a .YML file here
or pick one - we convert it to .JSON and give you the file to download

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Tested on macOS, Windows & Linux
Last verified Oct 2026

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How to convert YML to JSON

  1. Add your .YML file - drop it in the box above or click to browse.
  2. Convert it to .JSON in a few seconds.
  3. Download your new .JSON file.

What to expect

  • YAML # comments are silently dropped - JSON has no comment syntax, so any inline documentation in your .yml file will not appear in the output.
  • YAML anchors (&anchor) and aliases (*alias) are expanded: the JSON output repeats the full value at each reference point, which can increase file size.
  • Unquoted yes, no, on, and off are YAML booleans and will become true or false in JSON - quote them in the source .yml if you need the literal strings.

Frequently asked questions

Is YML-to-JSON conversion lossless?
For data, yes - all keys, values, lists, and nested objects convert exactly. YAML comments are the only thing dropped, because JSON has no comment syntax.
What happens to YAML anchors and aliases?
They are expanded: each alias is replaced with the full value it references, so the JSON output is correct but may be larger than the source .yml.
My YAML uses yes/no instead of true/false - will that cause problems?
Both yes and no are parsed as YAML booleans and will appear as true and false in JSON - quote them in the .yml source if you need the literal strings.
Can I convert JSON back to YML?
Yes - yq -o=yaml file.json > file.yml reverses the process, and the round-trip is lossless since JSON is a subset of YAML.
Learn about the formats: .YML · .JSON