JSON Formatter
Format, validate, and analyze JSON data with syntax highlighting and error detection.
JSON Input
Paste your JSON data here for formatting and validation
Formatted JSON
Formatted and validated JSON output
JSON Tips & Best Practices
Common JSON Rules:
- • Use double quotes for strings, not single quotes
- • No trailing commas after the last element
- • No comments allowed in JSON
- • Keys must be strings (in double quotes)
- • Values can be: string, number, boolean, null, object, array
Performance Tips:
- • Minify JSON for production to reduce size
- • Keep nesting levels reasonable (max 6-8 levels)
- • Use consistent naming conventions
- • Avoid deeply nested arrays when possible
- • Consider using shorter key names for large datasets