JSON Formatter & Validator

Format, validate, and beautify your JSON data

Input JSON
Output JSON
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Auto Format

Real-time validation and formatting as you type

Tree View

Collapsible tree structure for easy navigation

≈
Bracket Match

Hover brackets to highlight matching pairs

✕
Minify

Compress JSON by removing whitespace

About JSON Formatter Tool

Our free online JSON Formatter & Validator helps developers format, validate, and beautify JSON data instantly. Whether you're debugging API responses, cleaning up configuration files, or validating JSON syntax, this tool provides real-time feedback with error detection and statistics.

How to Use

  • Format JSON: Paste your JSON data and click "Format JSON" to beautify with proper indentation
  • Validate: Check if your JSON is valid without changing formatting
  • Minify: Remove all whitespace to reduce file size
  • 🔧 Auto-Correct: Automatically fix common JSON errors like single quotes, missing quotes, trailing commas, and more
  • Load Sample: Try with example data to see how it works

Features

  • Real-time JSON validation with detailed error messages
  • 🤖 AI-Powered Auto-Fix: Automatically suggests corrections for common JSON errors
  • Fixes single quotes, missing quotes, trailing commas, and more
  • Syntax highlighting for better readability
  • File size, line count, and key statistics
  • One-click copy to clipboard
  • Support for nested objects and arrays
  • Works offline - no data sent to server

Common Use Cases

  • Debugging REST API responses
  • Formatting configuration files (package.json, tsconfig.json)
  • Validating JSON schemas
  • Pretty-printing minified JSON data
  • Analyzing JSON structure and complexity
Privacy Notice: All JSON formatting and validation happens in your browser. Your data never leaves your device, ensuring complete privacy and security.