JSON to YAML Converter
Convert JSON text into formatted YAML with custom indentation and optional key sorting.
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This online tool converts valid JSON data into clean, readable YAML structure. You can paste raw JSON payloads containing nested objects, key-value mappings, numeric values, strings, lists, or empty structures. The converter translates your data into block-style YAML formatting while preserving Unicode characters across text fields. Use the optional formatting controls to customize your output. You can adjust the indentation level to match your project guidelines, with two spaces set by default. You can also enable key sorting to arrange mapping keys in alphabetical order, which simplifies structural diffs and configuration reviews. If your input contains invalid JSON syntax, such as trailing commas or missing quotation marks, the tool highlights the syntax issue and halts generation until corrected. Leaving the input empty produces blank output. This utility helps developers, system administrators, and technical writers transform API responses, structured schemas, and application settings into readable configuration files without manual reformatting.
Instructions
- Paste or type your JSON text into the input area.
- Set the desired indentation spacing, or keep the default value of 2.
- Check the sort keys option if you want object keys arranged alphabetically.
- Click Convert to generate the formatted YAML output.
- Copy the converted YAML text from the output area for use in your configuration files.
Examples
- Convert a flat JSON object: Input: {"server": "web-01", "port": 8080, "active": true} Output: active: true port: 8080 server: web-01
- Convert a nested structure with arrays: Input: {"project": "analytics", "tags": ["prod", "v2"], "settings": {"timeout": 30}} Output: project: analytics settings: timeout: 30 tags: - prod - v2
FAQ
What happens if I enter malformed JSON?
The tool requires valid JSON text. If the text contains syntax mistakes, like trailing commas or unquoted keys, the conversion stops and does not generate YAML.
Does the converter support Unicode characters?
Yes. Characters from international scripts and symbols are preserved directly in the resulting YAML.
How are JSON arrays formatted in the YAML output?
Non-empty arrays are structured as block-style lists prefixed with standard YAML hyphens.
Can I leave the input empty?
Yes. Empty or whitespace-only input is accepted and produces an empty YAML output.