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JSON Formatter & Validator Online - Free Tool

Format, validate, and beautify JSON data instantly. Free online JSON formatter with prettify, minify, and validation. No signup required.

Input JSON

Output

📋

Formatted JSON will appear here

✨ Format JSON Online

Beautify and indent your JSON with proper spacing for better readability. Perfect for debugging API responses.

🗜️ Minify JSON

Remove all whitespace and newlines to reduce file size for production. Optimize JSON for faster loading.

✓ Validate JSON

Check if your JSON is valid and get detailed error messages with line numbers. Fix JSON syntax errors instantly.

Free Online JSON Formatter & Beautifier

Our free JSON formatter is the fastest way to format, validate, and beautify JSON data online. Whether you're working with API responses, configuration files, or debugging JSON syntax errors, this tool provides instant results without any signup or installation required.

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data-interchange format that's easy for humans to read and write, and easy for machines to parse and generate. It's the most popular format for APIs, configuration files, and data storage.

Key Features of Our JSON Formatter

  • Format JSON Online: Instantly beautify and indent JSON with proper spacing
  • JSON Validator: Validate JSON syntax and get detailed error messages
  • Minify JSON: Compress JSON by removing whitespace for production
  • Copy & Download: Easily copy formatted JSON or download as a file
  • No Signup Required: Free to use, no registration or installation needed
  • Privacy First: All processing happens in your browser, data never leaves your device

Common Use Cases

  • Format API responses for better readability and debugging
  • Validate JSON configuration files before deployment
  • Minify JSON data to reduce file size and improve loading speed
  • Debug JSON parsing errors with detailed error messages
  • Convert between formatted and compact JSON formats
  • Clean up messy JSON from logs or database exports

Why Use This JSON Formatter?

Unlike other JSON formatters, our tool is completely free, requires no signup, and processes everything locally in your browser for maximum privacy and speed. Perfect for developers, DevOps engineers, and anyone working with JSON data daily.