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JSON to YAML

Convert JSON to YAML format instantly. Handles nested objects, arrays, strings, numbers, booleans and null values.

Click Convert or press Ctrl+Enter...

What is JSON to YAML Converter?

JSON to YAML is a developer tool that converts JavaScript Object Notation (JSON) data into YAML Ain't Markup Language (YAML) format. YAML is widely used in configuration files (Docker, Kubernetes, GitHub Actions, Ansible) because of its human-readable indentation-based syntax. This converter handles all JSON data types including nested objects, arrays, strings with special characters, numbers, booleans, and null values.

How to Use JSON to YAML Converter

  1. 1

    Paste your JSON

    Enter or paste valid JSON into the left text area. You can also click Load Example for a sample.

  2. 2

    Click Convert

    Press the Convert button or use Ctrl+Enter to transform your JSON into YAML.

  3. 3

    Review the output

    The YAML output appears in the right panel with proper indentation and formatting.

  4. 4

    Copy the result

    Click Copy to copy the YAML to your clipboard for use in your config files.

Features

  • Converts any valid JSON to properly formatted YAML
  • Handles deeply nested objects and arrays
  • Automatic string quoting for YAML-reserved characters
  • Supports booleans, numbers, null, and empty values
  • Inline error messages for invalid JSON input
  • Copy output with one click
  • Load example data to see it in action
  • Runs entirely in your browser — no server processing

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Frequently Asked Questions

What is the difference between JSON and YAML?+
JSON uses braces and brackets with quoted keys, while YAML uses indentation and colons. YAML is generally more human-readable and supports comments, but JSON is more widely used in APIs and data exchange.
Does this handle arrays correctly?+
Yes. JSON arrays are converted to YAML sequences using the dash-prefix syntax. Nested arrays and arrays of objects are both handled properly.
What about special characters in strings?+
Strings containing colons, hashes, braces, quotes, or other YAML-reserved characters are automatically wrapped in double quotes to prevent parsing issues.
Can I convert YAML back to JSON?+
Yes, we have a separate YAML to JSON converter tool at /tools/yaml-to-json that handles the reverse conversion.
Is there a size limit?+
No hard limit. The tool runs in your browser, so it can handle JSON files up to several megabytes depending on your device memory.
Does it preserve key order?+
Yes. Keys appear in the YAML output in the same order they appear in your JSON input.
Why do some values get quoted in YAML?+
YAML has reserved words (true, false, null, yes, no) and special characters. Values that could be misinterpreted are automatically quoted to ensure correctness.
Does it support JSON with comments?+
Standard JSON does not allow comments. If your JSON contains comments, they must be removed before conversion. The tool will show an error for invalid JSON syntax.