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JSON Formatter & Validator - Online JSON Tools

Format, validate, and beautify your JSON data instantly. Convert JSON to cURL commands and create shareable permalinks for collaboration.

Input JSON

Formatted Output

Formatted JSON will appear here...

What is JSON Formatting?

JSON (JavaScript Object Notation) formatting is the process of structuring JSON data in a readable, organized manner. Our JSON formatter tool automatically validates your JSON syntax and presents it in a clean, indented format that's easy to read and debug.

Whether you're working with API responses, configuration files, or data exchange between systems, properly formatted JSON makes development faster and reduces errors.

Key Features

  • Real-time validation: Instantly identifies JSON syntax errors
  • Pretty print mode: Formats with proper indentation and line breaks
  • Compact mode: Minifies JSON to a single line for production use
  • Copy functionality: One-click copying of formatted output
  • cURL generation: Creates API commands for testing
  • Error highlighting: Clear error messages with context

Common Use Cases

API Development

Format API responses and request payloads for better readability during development and debugging.

Configuration Files

Validate and format JSON configuration files for applications, ensuring proper syntax and structure.

Data Analysis

Clean up and structure JSON data from various sources for analysis and processing.

Code Review

Format JSON data for easier code review and documentation purposes.

How to Use the JSON Formatter

Step-by-Step Instructions

  1. Paste your JSON data into the input field on the left
  2. The tool automatically validates and formats your JSON in real-time
  3. Choose between "Pretty" mode for readability or "Compact" mode for minification
  4. Copy the formatted output using the Copy button
  5. Generate cURL commands for API testing if needed
  6. Any syntax errors will be displayed with helpful error messages

Pro Tips

  • Use Pretty mode for development and debugging
  • Use Compact mode to reduce file size for production
  • The tool works entirely in your browser - no data is sent to servers
  • Error messages include position information to help locate issues
  • Generated cURL commands include proper headers and formatting
  • The formatter handles nested objects and arrays of any depth

Why Use Our JSON Formatter?

Our JSON formatter is designed for developers who need a fast, reliable tool for working with JSON data. Unlike other formatters, ours provides real-time validation, multiple output formats, and generates useful cURL commands for API testing.

The tool is completely client-side, ensuring your data privacy and security. Whether you're debugging an API, preparing configuration files, or analyzing data structures, our formatter streamlines your workflow and helps you work more efficiently.