JSON Formatter & Validator

Free online JSON formatter and validator. Format, beautify, and validate JSON data with syntax highlighting and error detection.

About JSON Formatter

This JSON formatter and validator helps you format, beautify, and validate JSON data. It provides clear error messages when your JSON is invalid and can both format (prettify) and minify JSON strings.

Features

  • Format and beautify JSON with proper indentation
  • Minify JSON by removing whitespace
  • Validate JSON syntax with detailed error messages
  • Copy formatted output with one click
  • Works entirely in your browser - your data stays private

How to Use

  1. Paste your JSON data into the input textarea
  2. Click "Format JSON" to beautify or "Minify" to compress
  3. If there are syntax errors, they will be highlighted with line numbers
  4. Use "Copy Result" to copy the formatted JSON to your clipboard

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