JSON and YAML can represent many of the same data structures, but their syntax is different. Converting between them is useful when a service accepts one format while your source data uses the other.
Use the JSON ↔ YAML Converter to convert structured data without manually rewriting every key, object and array.
What should be preserved?
A good conversion should preserve object keys, nested objects, arrays, numbers, booleans and null values. The exact formatting may change because YAML relies heavily on indentation instead of braces and commas.
How to convert JSON to YAML
- Validate the JSON first if it came from an uncertain source.
- Open the JSON YAML Converter.
- Paste the JSON input.
- Convert it to YAML.
- Review indentation and values before using it in production.
Common conversion mistakes
- Accidentally changing a quoted numeric-looking string into a number.
- Breaking indentation in nested YAML.
- Assuming comments from YAML can survive a round trip through JSON.
- Using tabs where a YAML parser expects spaces.
Validate after conversion
If the result will be used for CI, deployment, containers or application configuration, test it with the target application rather than assuming syntactically valid YAML is semantically correct.
For JSON cleanup before conversion, use the JSON Formatter. If you need XML instead, use the JSON XML Converter.
Security note
Do not paste secrets such as production API keys, passwords or private tokens into any tool unless you are comfortable with how that tool processes data. Use test values when possible.
Convert your data with the UptimeFixer JSON YAML Converter.