JSON Ease - Beautify and Validate JSON Online
Why Use Our JSON Formatter?
- Format JSON for better readability and debugging.
- Minify JSON to reduce file size for optimized performance.
- Validate JSON to ensure it's well-structured and error-free.
- Supports large JSON files without performance issues.
Need to format JSON regularly? Bookmark this page for error-free JSON.
Common JSON Formatting Errors
Learn about common JSON formatting errors and how to fix them. Avoid mistakes like missing commas, mismatched brackets, and invalid data types.
Missing or Extra Commas
✅ Correct:{ "name": "John", "age": 30 }
❌ Incorrect:{ "name": "John" "age": 30 } // Missing comma
Mismatched or Missing Brackets/Braces
✅ Correct:{ "person": { "name": "John", "age": 30 } }
❌ Incorrect:{ "person": { "name": "John", "age": 30 ] } // Mismatched brackets
Keys Must Be Strings
✅ Correct:{ "name": "John", "age": 30 }
❌ Incorrect:{ name: "John", age: 30 } // Keys must be in double quotes
Invalid Data Types
✅ Correct:{ "age": 30, "isStudent": true, "name": "John" }
❌ Incorrect:{ "age": 30, "isStudent": True, "name": 'John' } // True should be lowercase
Numbers Cannot Have Leading Zeros
✅ Correct:{ "price": 100 }
❌ Incorrect:{ "price": 0123 } // Leading zero not allowed
Improper String Formatting
✅ Correct:{ "message": "Hello \"World\"" }
❌ Incorrect:{ "message": "Hello "World"" } // Quotes inside strings must be escaped
Using Undefined or NaN Values
✅ Correct:{ "value": null }
❌ Incorrect:{ "value": NaN } // JSON does not support NaN
JSON Cannot Have Comments
✅ Correct:{ "name": "John" }
❌ Incorrect:{ "name": "John" // This is a comment } // JSON does not support comments
Arrays Must Be Properly Formatted
✅ Correct:{ "fruits": ["apple", "banana", "cherry"] }
❌ Incorrect:{ "fruits": ["apple", "banana",] } // Trailing comma not allowed
Duplicate Keys
✅ Correct:{ "name": "John", "age": 30 }
❌ Incorrect:{ "name": "John", "name": "Doe" } // Duplicate keys are not allowed