JSON to YAML Converter
Convert JSON to YAML in your browser. Nothing uploaded.
Built with js-yaml (MIT), self-hosted.
How to use this tool
- Paste JSON.
- Convert.
- Download YAML.
Convert JSON to YAML in your browser. Nothing uploaded.
How it works
This tool converts a JSON document into equivalent YAML, running entirely in your browser. It is useful when you need to turn a JSON configuration or API response into a more human-readable format for editing or storing in a config file.
Paste valid JSON into the input. The converter maps JSON objects to YAML mappings, arrays to YAML sequences, and primitive values to YAML scalars. The output uses two-space indentation for clarity.
Common use cases include creating Kubernetes or Helm chart values files from JSON defaults, converting API-generated configs into editable YAML, and making dense JSON easier to read and diff.
The result is standard YAML that can be pasted into any config file or further edited before use.
Worked example
Turn a JSON config file into YAML for a Kubernetes manifest
- Copy the JSON configuration object from your application settings.
- Paste it into the JSON to YAML tool.
- Click Convert.
- Copy the YAML output and paste it into your values.yaml file.
A clean, indented YAML file that is easier to read and edit than the original JSON.
Common mistakes to avoid
- Pasting invalid JSON (trailing commas, unquoted keys) — fix JSON syntax errors before converting.
- Assuming the YAML output is ready to use as a complete config file without adding required top-level fields.
- Editing the JSON output as if it were YAML — they are different formats with different syntax rules.
Key terms
- YAML mapping
- The YAML equivalent of a JSON object — a set of key: value pairs, one per line.
- YAML sequence
- The YAML equivalent of a JSON array — a list of items each prefixed with a dash (- ).
- Scalar
- A leaf value such as a string, number, boolean, or null — represented plainly without brackets.
Frequently asked questions
- Does it keep types?
- Yes — numbers, booleans and nested structures are preserved.