JSON ↔ YAML Converter

Convert between JSON and YAML data formats

JSON Input

YAML Output

Converted output will appear here

Sample Data

JSON Example

{
  "name": "John Doe",
  "age": 30,
  "email": "[email protected]",
  "roles": ["admin", "user"],
  "active": true
}

YAML Example

name: John Doe
age: 30
email: [email protected]
roles:
  - admin
  - user
active: true

JSON vs YAML Comparison

FeatureJSONYAML
ReadabilityModerateHigh (human-friendly)
SyntaxBraces and bracketsIndentation-based
CommentsNot supportedSupported (#)
Common UseAPIs, WebConfig files, DevOps

Understanding JSON and YAML Formats

JSON (JavaScript Object Notation) and YAML (YAML Ain't Markup Language) are two of the most popular data serialization formats used in software development. While both serve similar purposes for storing and transmitting structured data, they have distinct characteristics that make each suitable for different use cases.

How to Use This Converter

  1. Select Direction - Choose whether to convert JSON to YAML or YAML to JSON.
  2. Paste Your Data - Enter or paste your JSON/YAML content in the input area.
  3. Click Convert - Press the convert button to transform your data.
  4. Copy Result - Use the copy button to copy the converted output.

When to Use Each Format

Use JSON for:
  • - REST API responses
  • - JavaScript applications
  • - Data interchange
  • - Browser storage (localStorage)
Use YAML for:
  • - Configuration files
  • - Docker Compose
  • - Kubernetes manifests
  • - CI/CD pipelines (GitHub Actions)

Key Differences

  • Syntax - JSON uses braces {} and brackets [], while YAML uses indentation.
  • Comments - YAML supports comments with #, JSON does not.
  • Quotation - JSON requires quotes around strings, YAML often doesn't.
  • File Size - YAML files are typically smaller due to less punctuation.
  • Parsing - JSON is faster to parse; YAML is more complex.

FAQ

Is YAML a superset of JSON?

Yes, valid JSON is also valid YAML (in YAML 1.2+). This means you can use JSON syntax within YAML files.

Why are comments not preserved when converting YAML to JSON?

JSON doesn't support comments by design. Any comments in YAML will be lost during conversion to JSON.

Which format is better for configuration files?

YAML is generally preferred for config files due to its readability, comment support, and cleaner syntax for nested structures.