JSON Formatter

Format, validate, and beautify JSON data

About JSON Formatter

Our free JSON formatter tool helps developers format, validate, and beautify JSON (JavaScript Object Notation) data instantly. JSON 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 widely used in web development, APIs, configuration files, and data storage.

What is JSON?

JSON (JavaScript Object Notation) is a text format for storing and transporting data. It's language-independent and uses conventions familiar to programmers of C-family languages. JSON is built on two structures:

  • Objects: Collections of key-value pairs (e.g., {"name": "John", "age": 30})
  • Arrays: Ordered lists of values (e.g., [1, 2, 3, "four"])

JSON is commonly used for transmitting data in web applications, storing configuration files, and exchanging data between servers and web applications.

Key Features

✨ Format JSON

Automatically format JSON with proper indentation and line breaks for better readability.

✅ Validate JSON

Check JSON syntax and get detailed error messages if your JSON is invalid.

📦 Minify JSON

Remove all whitespace to create compact JSON files for production use.

🔒 Privacy First

All processing happens in your browser. No data is sent to servers.

Common Use Cases

  • API Development: Format JSON responses from APIs to make them readable during development and debugging.
  • Configuration Files: Format JSON configuration files for applications, servers, or build tools.
  • Data Validation: Validate JSON data before sending it to APIs or storing it in databases.
  • Code Review: Format JSON in code reviews to make changes easier to understand.
  • Documentation: Format JSON examples in documentation to improve readability.
  • Production Optimization: Minify JSON files to reduce file size and improve load times.

How to Use

  1. Paste your JSON: Copy and paste your JSON code into the input field.
  2. Format: Click "Format" to beautify your JSON with proper indentation.
  3. Validate: Click "Validate" to check if your JSON syntax is correct.
  4. Minify: Click "Minify" to remove all whitespace and create a compact version.
  5. Copy: Click "Copy" to copy the formatted JSON to your clipboard.

Examples

  • Simple Object: {"name": "John", "age": 30, "city": "New York"}
  • Nested Object: {"user": {"name": "John", "address": {"street": "123 Main St", "city": "NYC"}}}
  • Array of Objects: [{"id": 1, "name": "Item 1"}, {"id": 2, "name": "Item 2"}]
  • Complex JSON: Mix of objects, arrays, strings, numbers, booleans, and null values.

Frequently Asked Questions

How do I format JSON online?

Simply paste your JSON code into the input field and click 'Format'. The tool will automatically format your JSON with proper indentation and line breaks, making it easy to read and understand.

Can I validate JSON syntax?

Yes! Click the 'Validate' button to check if your JSON is valid. The tool will show you any syntax errors with detailed error messages, including the line number and type of error.

What is JSON minification?

JSON minification removes all unnecessary whitespace, line breaks, and indentation from JSON code to reduce file size. This is useful for production environments where smaller file sizes improve performance.

Is this JSON formatter free?

Yes, our JSON formatter is 100% free forever. No ads, no login required, and all processing happens in your browser for complete privacy and security.

Can I format large JSON files?

Yes, our tool can handle large JSON files. However, very large files (over 10MB) may take longer to process. For extremely large files, consider using a desktop application.