JSON vs YAML

Compare JSON and YAML: syntax, readability, comments, and where each format fits best in configs, APIs and data exchange.

JSON and YAML both represent structured data, but they trade readability and features for strictness and ubiquity. Choosing between them usually comes down to whether a human or a machine is the primary consumer.

JSON Formatter

  • Strict, minimal syntax with no comments, which makes it unambiguous and easy to parse everywhere.
  • The native format of web APIs and JavaScript, with built-in browser support.
  • No anchors, aliases or multi-line strings, keeping the data model simple.
Open JSON Formatter

YAML ↔ JSON Converter

  • Human-friendly with comments, indentation-based nesting, anchors and multi-line strings.
  • A superset of JSON's data model, so any JSON is also valid YAML.
  • Indentation-sensitive, so mixed tabs and spaces are the most common cause of parse errors.
Open YAML ↔ JSON Converter

Verdict

Use JSON for APIs and machine-to-machine data, and YAML for human-edited configuration files where comments and readability matter.