Developer Tool
YAML ⇄ JSON Converter
Convert between YAML and JSON formats instantly. Bidirectional conversion with syntax validation, formatting, and one-click copy.
🔄 Bidirectional
✓ Syntax Check
📋 One-Click Copy
🆓 100% Free
YAML ⇄ JSON Converter
This free online tool converts data between YAML and JSON formats instantly. Both are popular data serialization standards used for configuration files, API responses, and data exchange in modern applications.
YAML vs JSON — Key Differences
YAML
YAML Ain't Markup Language
- Indentation-based structure (no braces needed)
- Supports comments with
#character - More human-readable and concise
- Great for configuration files
- Supports anchors and aliases
- File extension:
.yamlor.yml
JSON
JavaScript Object Notation
- Uses braces
{}and brackets[] - Requires double quotes for keys and strings
- No comments supported
- Great for API responses and web data
- Universal support across all languages
- File extension:
.json
Example YAML:
name: John Doe
age: 30
is_student: false
address:
street: 123 Main St
city: New York
zipcode: "10001"
hobbies:
- reading
- swimming
- coding
contact:
email: john@example.com
phone: null
Example JSON:
{
"name": "John Doe",
"age": 30,
"isStudent": false,
"address": {
"street": "123 Main St",
"city": "New York",
"zipcode": "10001"
},
"hobbies": [
"reading",
"swimming",
"coding"
],
"contact": {
"email": "john@example.com",
"phone": null
}
}
💡 Pro Tip:
Use the Swap button to instantly reverse the conversion direction. Perfect for round-trip testing and verifying data integrity between formats.
Why Use This Converter?
Instant Conversion
Get formatted output in milliseconds.
Bidirectional
YAML → JSON and JSON → YAML supported.
Syntax Validation
Detect errors with precise messages.
One-Click Copy
Copy output instantly to clipboard.
Swap Feature
Instantly reverse conversion direction.
100% Private
All processing happens securely. Data never stored.
💡 Note: This tool performs standard conversions following official YAML 1.2 and JSON (RFC 8259) specifications. Some YAML-specific features like anchors may not translate perfectly to JSON.
🤖
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