Paste valid JSON
Format or repair the JSON first when a parser reports syntax problems.
JSON tools
JSON to YAML Converter
Convert JSON to YAML
YAML output
The result will appear here after you run the tool.
Press Ctrl or Command and Enter to run the tool.
About this tool
About this tool
JSON to YAML transforms valid JSON into readable YAML for configuration and documentation by re-serializing the parsed structure with preserved types and nesting. The conversion runs entirely in your browser without uploading.
Paste valid JSON and convert it to readable YAML for configuration files, documentation, and developer workflows.
Built for daily work
- Create configuration files from JSON.
- Convert API examples for YAML documentation.
- Prepare Kubernetes or CI configuration starting points.
- Compare the readability of JSON and YAML structures.
How to use this tool
How to use this tool
Convert locally
The converter maps objects, arrays, strings, numbers, booleans, and null values into YAML.
Copy or download
Review quoting and indentation before using the YAML in a configuration file.
Key features
Key features
Standard YAML block style output
Objects become mappings and arrays become sequences with consistent indentation. Numbers, booleans, and nulls are written as bare YAML scalars.
Automatic quoting where needed
Strings that resemble YAML booleans, numbers, or special characters are quoted so the output parses back to the same JSON values.
Round-trip limitations to review
JSON does not preserve anchors, tags, or multiline block scalars. A YAML-to-JSON-to-YAML round trip will flatten these constructs.
Browser-side conversion via js-yaml
The js-yaml library parses the JSON and serializes YAML entirely in the browser. No data leaves your device.
Practical use cases
Practical use cases
- Create configuration files from JSON.
- Convert API examples for YAML documentation.
- Prepare Kubernetes or CI configuration starting points.
- Compare the readability of JSON and YAML structures.
Private by default
For local tools, input is processed in your browser and is not sent to application analytics.
Data processing noticeTechnical details
Technical details
InputStrict JSON
OutputYAML block style
Libraryjs-yaml in the browser
ProcessingLocal browser processing
Limitations and important notes
Limitations and important notes
- JSON comments and formatting cannot be preserved because they are not part of parsed JSON data.
- YAML specific features such as anchors and custom tags are not generated.
- Review ambiguous strings before production use.
Frequently asked questions
Frequently asked questions
No. JSON has no comments, so there is no source comment information to preserve.
Data values should be preserved, but formatting and some scalar style choices will differ.
The JSON source has no anchor concept, so the generated YAML does not create anchors or aliases.
Related guides and solutions
Related guides and solutions
YAML syntax reference for configuration and data files
A practical YAML reference that emphasizes indentation, ambiguous scalar values, safe parsing, and predictable conversion to JSON.
Learn moreJSON syntax and data type reference
A compact technical reference for writing and validating strict JSON that can be opened in standards-compliant parsers.
Learn moreWhat local browser processing means for online tools
A transparent explanation of local tool processing, temporary browser memory, local storage, downloads, analytics boundaries, and cases that require remote services.
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