JSON Formatter
Format, validate, and beautify JSON data with syntax highlighting and error detection.
JSON Input
Valid
Lines: 1 | Characters: 0
Formatted Output
Enter valid JSON to see formatted output
JSON Tips & Common Errors
Valid JSON Rules:
- • Use double quotes for strings
- • No trailing commas
- • No comments allowed
- • Keys must be strings
- • Values: string, number, boolean, null, object, array
Common Mistakes:
- • Single quotes instead of double
- • Unescaped special characters
- • Missing commas between elements
- • Undefined or function values
- • Circular references