Input JSON 0 characters
Formatted Output 0 characters

Features

✨

Format & Beautify

Format messy JSON with proper indentation and syntax highlighting

✓

Validate JSON

Detect syntax errors, duplicate keys, and invalid JSON structure

🗜️

Minify & Compress

Compress JSON by removing whitespace for production use

🌳

Tree Visualization

Visualize JSON structure in an interactive tree view

🔍

Error Detection

Automatically detect duplicate fields and common errors

📝

Example Generator

Generate sample JSON data for testing and development

About JSON Formatter

JSON Formatter is a powerful, free online tool designed for developers, programmers, and anyone working with JSON (JavaScript Object Notation) data. Our tool helps you format, validate, minify, and visualize JSON with ease.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that is easy for humans to read and write and easy for machines to parse and generate. It is widely used for transmitting data in web applications, APIs, and configuration files.

Key Features

  • Format & Beautify: Transform messy, unformatted JSON into clean, readable code with proper indentation and syntax highlighting. Perfect for debugging and code review.
  • Validate JSON: Instantly detect syntax errors, duplicate keys, and invalid JSON structure. Get detailed error messages with exact locations to fix issues quickly.
  • Minify & Compress: Remove all unnecessary whitespace and line breaks to create compact JSON files. Ideal for production environments where file size matters.
  • Tree Visualization: Visualize complex JSON structures in an interactive tree view. Navigate nested objects and arrays with ease.
  • Error Detection: Automatically identify duplicate fields, missing commas, and other common JSON errors.
  • Privacy Protected: All JSON processing happens entirely in your browser. Your data never leaves your device, ensuring complete privacy and security.

Use Cases

Our JSON formatter is perfect for:

  • Web developers formatting API responses
  • Frontend developers debugging JSON data
  • Backend developers validating JSON structures
  • Data analysts working with JSON datasets
  • Students learning JSON syntax
  • Anyone needing to quickly format or validate JSON

Why Choose Our JSON Formatter?

Unlike other JSON tools, our formatter offers:

  • 100% Free: No registration, no fees, no hidden costs
  • Fast & Accurate: Process large JSON files instantly with precise formatting
  • Privacy First: All processing happens locally in your browser
  • User-Friendly: Intuitive interface with real-time validation
  • Multiple Formats: Support for formatting, minifying, and tree view
  • Error Detection: Advanced error detection with detailed messages

Technical Details: Our JSON formatter uses native JavaScript JSON parsing for maximum compatibility and performance. It supports all standard JSON data types including objects, arrays, strings, numbers, booleans, and null values.

All calculations and processing are performed entirely in your browser using client-side JavaScript. No data is sent to any server, ensuring your JSON data remains completely private and secure.

Frequently Asked Questions

What is a JSON formatter?

A JSON formatter is an online tool that formats, validates, and beautifies JSON (JavaScript Object Notation) data. It helps developers format messy JSON code into readable, properly indented format with syntax highlighting.

How do I format JSON online?

Simply paste your JSON code into the input area and click the 'Format' button. The tool will automatically format your JSON with proper indentation and syntax highlighting. This makes your JSON code more readable and easier to debug.

Can I validate JSON syntax for errors?

Yes, our JSON formatter automatically validates JSON syntax and highlights any errors. It will show you the exact location and type of error in your JSON code, including missing commas, brackets, and invalid characters.

How do I minify or compress JSON?

Click the 'Minify' button to compress your JSON by removing all unnecessary whitespace and line breaks. This is useful for reducing file size in production environments and improving API response times.

Is my JSON data secure and private?

Yes, all JSON processing is done entirely in your browser using client-side JavaScript. Your data never leaves your device, ensuring complete privacy and security. We don't collect, store, or transmit any of your JSON data.

Can I visualize JSON structure in a tree view?

Yes, our tool provides an interactive tree view that visualizes the JSON structure, making it easier to understand complex nested JSON objects and arrays. You can expand and collapse nodes to navigate through the structure.

What types of JSON errors can be detected?

Our JSON validator can detect syntax errors like missing commas, brackets, quotes, invalid characters, duplicate keys, and malformed JSON structures. It provides detailed error messages to help you fix issues quickly.

Is the JSON formatter free to use?

Yes, our JSON formatter is completely free to use. No registration, no fees, and no hidden costs. You can format, validate, and minify JSON as many times as you need without any limitations.

Can I use this JSON tool on mobile devices?

Absolutely! Our JSON formatter is fully responsive and works perfectly on desktop, tablet, and mobile devices. The interface adapts to your screen size for optimal usability.