How do I convert JSON to YAML?

Paste your JSON into the input area and the tool converts it to YAML instantly. JSON objects become YAML key-value pairs with colons, arrays become dash-prefixed lists, and nested structures use indentation instead of braces.

What is the difference between JSON and YAML?

JSON uses braces {}, brackets [], and quoted keys with strict syntax. YAML uses indentation and colons with minimal punctuation, making it more human-readable. YAML supports comments (#) and multi-line strings, which JSON does not. JSON is better for APIs and data exchange; YAML is preferred for configuration files.

Can I convert Docker Compose JSON to YAML?

Yes. Paste your Docker Compose configuration in JSON format and get valid YAML output. The tool preserves the complete structure including services, volumes, networks, and environment variables. Click the "Docker Compose" preset to see an example.

Does this tool handle nested objects and arrays?

Yes. The converter handles deeply nested JSON structures including objects within arrays, arrays within objects, and mixed types at any depth. Nested objects use increased indentation; arrays use dash prefixes.

Is the conversion lossless?

Yes for standard JSON data types. All JSON strings, numbers, booleans, null values, objects, and arrays convert accurately to their YAML equivalents. Strings that could be misinterpreted (like "true", "123", or strings with colons) are automatically quoted in the YAML output.

Does this tool work offline?

Yes. All conversion runs entirely in your browser using JavaScript. No data is sent to any server. The tool works without an internet connection once the page is loaded.

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JSON to YAML Converter

JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are both data serialization formats. JSON uses braces and brackets with quoted keys; YAML uses indentation and colons without quotes. YAML is more human-readable for configuration files. To convert: objects become key-value pairs with colons, arrays become dash-prefixed lists, and nested objects use indentation.

Convert JSON to YAML instantly. Paste any valid JSON and get clean, properly indented YAML output. Supports nested objects, arrays, and all JSON data types. Perfect for creating Docker Compose files, Kubernetes configs, and CI/CD pipelines.

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JSON Input

YAML Output

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Quick Examples

How to Use

1
Paste your JSON
Paste or type valid JSON into the input area — the tool validates it automatically
2
View the YAML output
The converter instantly transforms your JSON into properly indented YAML
3
Try a preset
Click a quick example like Docker Compose or Nested Object to see the conversion
4
Copy the result
Click Copy to copy the YAML output to your clipboard
5
Use in your project
Paste the YAML into your config file — docker-compose.yml, .github/workflows, etc.

Frequently Asked Questions

How do I convert JSON to YAML?: Paste your JSON into the input area and the tool converts it to YAML instantly. JSON objects become YAML key-value pairs with colons, arrays become dash-prefixed lists, and nested structures use indentation instead of braces.
What is the difference between JSON and YAML?: JSON uses braces {}, brackets [], and quoted keys with strict syntax. YAML uses indentation and colons with minimal punctuation, making it more human-readable. YAML supports comments (#) and multi-line strings, which JSON does not. JSON is better for APIs and data exchange; YAML is preferred for configuration files.
Can I convert Docker Compose JSON to YAML?: Yes. Paste your Docker Compose configuration in JSON format and get valid YAML output. The tool preserves the complete structure including services, volumes, networks, and environment variables. Click the "Docker Compose" preset to see an example.
Does this tool handle nested objects and arrays?: Yes. The converter handles deeply nested JSON structures including objects within arrays, arrays within objects, and mixed types at any depth. Nested objects use increased indentation; arrays use dash prefixes.
Is the conversion lossless?: Yes for standard JSON data types. All JSON strings, numbers, booleans, null values, objects, and arrays convert accurately to their YAML equivalents. Strings that could be misinterpreted (like "true", "123", or strings with colons) are automatically quoted in the YAML output.
Does this tool work offline?: Yes. All conversion runs entirely in your browser using JavaScript. No data is sent to any server. The tool works without an internet connection once the page is loaded.