JSON Formatter

Format, validate, and beautify JSON data

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JSON Best Practices

  • Use double quotes for strings and property names
  • No trailing commas in objects and arrays
  • Use null for empty values, not undefined
  • Keep property names consistent and meaningful
  • Validate JSON before using in production

Common JSON Errors

Trailing Comma
{"name": "John",}
Remove the comma after the last property
Single Quotes
{'name': 'John'}
Use double quotes for strings
Missing Quotes
{name: "John"}
Property names must be quoted

JSON Data Types

📄
String
"text"
🔢
Number
123
✅
Boolean
true
🚫
Null
null
📦
Object
{"key": "value"}
📋
Array
["item1", "item2"]