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Guide

How to Convert Between YAML and JSON

Learn how YAML and JSON relate, why conversion is mostly mechanical, and the pitfalls to watch for.

Open the YAML to JSON Converter

A YAML-to-JSON converter parses YAML and emits equivalent JSON, or vice versa. Because YAML is a superset of JSON, the two are largely interchangeable for data, but each has strengths.

How YAML and JSON relate

JSON uses braces and brackets to show structure; YAML uses indentation. YAML supports comments, multi-line strings, and anchors, which JSON does not. Converting YAML to JSON loses comments and some YAML-specific features but produces a strict, widely supported format.

Why convert between them

  • Config files: YAML is human-friendly to write; JSON is machine-friendly to parse.
  • CI/CD pipelines often accept YAML but tools downstream want JSON.
  • Sharing data with systems that only read JSON.
  • Validating YAML syntax by round-tripping through JSON.

How to use the converter

  1. Paste YAML or JSON.
  2. Choose the conversion direction.
  3. Read the converted output and any validation errors.
  4. Copy the result.

Examples

The YAML "name: Jane\nage: 30" converts to the JSON {"name":"Jane","age":30}. A nested YAML block with lists and maps becomes the equivalent JSON object with arrays and objects — structure is preserved, comments are dropped.

Pitfalls to watch for

YAML is whitespace-sensitive — inconsistent indentation breaks parsing. YAML also auto-converts unquoted values like "yes", "no", "1.2" into booleans, strings, or numbers in surprising ways; quote strings when in doubt. JSON output drops any YAML comments.

Put it into practice

Use the YAML to JSON Converter right now — free, in your browser, no sign-up required.

Try the YAML to JSON Converter

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