HandyTools Hub
← Back to Tools

JSON Formatter

Format, validate, and beautify JSON data with syntax highlighting.

Formatted JSON will appear here...

Try it with a real API response

Format a compact API response

Input

{"name":"Ada","roles":["admin","editor"]}

Formatted result

{
  "name": "Ada",
  "roles": [
    "admin",
    "editor"
  ]
}

Formatting cannot guess your intent

The tool can show where JSON is invalid, but you must decide whether a value is text, a number, or null.

Read the JSON.parse troubleshooting guide

How to Use

  1. Paste your JSON: Enter or paste your JSON data into the input field
  2. Format or Minify: Click “Format” to beautify with proper indentation, or “Minify” to compress
  3. View results: The formatted output appears with syntax highlighting
  4. Copy: Click the copy button to copy the result to clipboard

Features

  • Syntax highlighting for easy reading — color-coded output makes JSON structure clear
  • Format/beautify with proper indentation — turn messy JSON into clean, readable code
  • Minify to reduce file size — compress JSON for production use
  • Validate JSON with error messages — catch and fix syntax errors instantly
  • Copy to clipboard with one click — quickly copy formatted results
  • 100% client-side processing for privacy — your data never leaves your browser

Use Cases

  • API Debugging: Format JSON responses from APIs for easy reading
  • Code Cleanup: Beautify minified JSON from production
  • Data Validation: Check if your JSON is valid before using it
  • Documentation: Format JSON examples for documentation

Frequently Asked Questions

What is a JSON Formatter?

A JSON Formatter is a tool that formats, validates, and beautifies JSON data. It makes JSON readable by adding proper indentation and line breaks.

Is my data safe?

Yes, all processing happens in your browser. Your data never leaves your device and is not sent to any server.

What's the maximum file size?

There's no hard limit. The tool can handle large JSON files, though very large files (over 10MB) may slow down your browser.