JSON to YAML Converter - Convert Configuration and Data

JSON to YAML Converter for Configuration and Data

The JSON to YAML Converter turns JSON into YAML for configuration files, documentation, and test fixtures. Paste JSON or select a file, review the output, and use the copy or download controls to save it.

Review Input and Output

Invalid JSON can produce a parser error, such as Unexpected token } in JSON at position 142. Error wording depends on the parser. Correct the input before relying on the output.

The YAML uses two-space indentation and the setting lineWidth: -1 to avoid automatic line wrapping. Check long values before pasting into files such as values.yaml or docker-compose.yml.

How to Use the JSON to YAML Converter

1. Paste source into JSON Input, or drop or select a JSON file. A sample is {"name": "John", "age": 30}.
2. Review YAML Output and any error message.
3. Use Copy or Download YAML.
4. Check the destination schema before using the result.

Configuration Structure Still Matters

Converting a document does not turn arbitrary API data into a valid manifest for tools such as kustomize. The receiving application still requires its own fields and types.

YAML supports literal (|) and folded (>) strings. Review their formatting if you edit the result. The converter cannot infer comments you want to add.

Check Types and Numbers

JSON null maps to a YAML null value such as null. Boolean values true and false remain booleans, commonly written as true and false.

Do not rely on numeric spelling being preserved: input written as 1.0 need not keep the textual form 1.0. The js-yaml serializer writes parsed values; it cannot restore precision already lost while parsing a large JSON number.

The string example {"version": "1.0"} can become version: '1.0'. Retain quoting when a value should stay text. YAML versions and schemas can differ: an unquoted NO may be interpreted as false by a YAML 1.1 consumer.

Before Saving Configuration

The lineWidth: -1 setting affects wrapping, not application validity. A command such as kubectl apply --dry-run=client can help check a Kubernetes manifest, but review what that validation covers before deployment.

Conversion uses JSON.parse and js-yaml's dump() function. Keep an original copy and compare important numbers, strings, and arrays after conversion.

Using js-yaml is not a privacy guarantee. Remove credentials and customer information before entering a sample, and follow your organization's handling requirements.