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JSON to YAML Converter

Convert JSON to YAML and YAML to JSON instantly with real-time preview and validation.

JSON Input

YAML Output

About JSON to YAML Converter

Free online JSON to YAML converter that transforms your JSON data into clean, readable YAML format in real time. Paste or type JSON on the left and get perfectly formatted YAML on the right — or swap directions to convert YAML back to JSON. Supports nested objects, arrays, multi-line strings, and all JSON data types. Includes a Format JSON button to prettify your input, sample data for quick testing, and one-click copy. 100% browser-based, no signup required, and your data never leaves your device.

Frequently Asked Questions

What is YAML?▾

YAML (YAML Ain't Markup Language) is a human-readable data serialization format commonly used for configuration files (Docker Compose, Kubernetes, GitHub Actions, Ansible). Unlike JSON, YAML uses indentation instead of braces, making it cleaner and easier to read for configuration purposes.

What are the differences between JSON and YAML?▾

JSON uses braces {} and brackets [] with quoted keys, while YAML uses indentation and colons. YAML supports comments (# ...), multi-line strings, and anchors/aliases. JSON is better for data exchange between systems (APIs), while YAML is preferred for configuration files that humans read and edit frequently.

Does the converter handle nested objects and arrays?▾

Yes. The converter fully supports deeply nested objects, arrays of objects, arrays of primitives, mixed types, and empty collections. Nested YAML uses proper indentation (2 spaces per level), and arrays use the '- ' prefix notation.

Can I convert YAML back to JSON?▾

Yes. Click the 'Swap' button to switch directions. Paste your YAML in the input field and get valid JSON output. The tool handles key-value pairs, nested structures, arrays with '- ' notation, quoted strings, numbers, booleans, and null values.

Is my data safe?▾

Yes, completely. All conversion happens in your browser using JavaScript — no data is sent to any server. Your JSON and YAML content never leaves your device.

Is this tool free?▾

Yes, 100% free with no signup, no ads, and no usage limits. Convert as many files as you want.

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