TOOLZILLA

JSON Formatter

Paste your JSON below and click format to beautify and validate it instantly.

Free Online JSON Formatter Tool

ToolZilla's JSON Formatter helps you beautify, validate, and understand complex JSON data in seconds. Perfect for developers, analysts, and anyone working with APIs.

Common Use Cases

👨‍💻

Developers

Quickly debug or validate JSON responses from APIs.

📊

Data Analysts

Make nested JSON easier to read and extract data from.

Key Features

  • Real-time JSON formatting and validation
  • Error highlighting for malformed JSON
  • Completely private — data stays in your browser
  • Responsive design, works across devices

Tips for Working with JSON

  • Use JSON.stringify(obj, null, 2) in JavaScript to format manually
  • Validate JSON before using it in APIs or databases
  • Use nested structures wisely for readability

Frequently Asked Questions

Q: Is the JSON Formatter free?

A: Yes, it's 100% free to use.

Q: Does this store or send my data?

A: No. All processing happens in your browser — nothing is saved or sent.

Q: Can I use it on mobile?

A: Yes! It's fully mobile-responsive.