JSON Formatter & Validator

Format, validate, and beautify JSON data with real-time syntax highlighting

JSON Processor

Developer

Input JSON

Characters: 0

Formatted Output

Formatted JSON will appear here...

JSON Examples & Tips

Quick Examples

Common JSON Rules

• Double quotes: Keys and string values must use "
• No trailing commas: Last item in objects/arrays shouldn't have comma
• Valid values: Strings, numbers, booleans, null, objects, arrays
• No comments: JSON doesn't support // or /* */ comments

Features

• Syntax Highlighting: Colors for keys, strings, numbers, booleans
• Error Detection: Line numbers and exact error locations
• Formatting: 2-space indentation for readability
• Minification: Remove whitespace for production
• Local Processing: All processing happens in your browser

Privacy & Security

All JSON processing happens locally in your browser. No data is sent to any server, making this tool safe for sensitive data. Your JSON never leaves your computer.