JSON to YAML Converter
Convert JSON data to YAML online. Paste JSON and the equivalent YAML appears instantly, with support for objects, arrays and nested structures, making it handy for configuration file conversion.
FreeOnline Tool
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How to Use
- Paste or edit your JSON in the input box
- The converted YAML appears below in real time, with no button to press
- If the JSON is malformed, a specific parse error is displayed instead
Features
- Converts any valid JSON, including objects, arrays, strings, numbers, booleans, null and deeply nested structures, into equivalent YAML
- Converts as you type, with no manual trigger
- Reports a clear parse error when the JSON is invalid rather than emitting incorrect output
Use Cases
Migrating configuration formats
Turn JSON configuration, such as a package.json fragment or an API response sample, into YAML for Kubernetes, CI/CD and other YAML-oriented tooling.
Writing Docker Compose and Kubernetes manifests
Sketch the structure in JSON first, then convert it in one step and paste the YAML into your real configuration file.
Comparing the two formats
View the same data expressed as JSON and as YAML side by side while learning or teaching the difference.
Saving API responses as YAML
Convert JSON returned by an API into more readable YAML for documentation or notes.
FAQ
Which JSON data types are supported?
All of them: objects, arrays, strings, numbers, booleans and null, including deeply nested combinations.
Is the YAML indentation configurable?
No. Output follows standard YAML indentation rules consistently. If you need a particular indent width or other formatting details, adjust the result afterwards with a dedicated YAML formatter.
Will non-ASCII text such as Chinese come out garbled?
No. Conversion happens locally as UTF-8 text, so Chinese and other non-ASCII characters are preserved exactly.
Is my data uploaded to a server?
No. Conversion runs entirely in your browser and nothing is transmitted.