Free Online JSON Formatter & Validator

Welcome to our powerful JSON Formatter and Validator tool! Whether you're a developer debugging API responses, a data analyst working with JSON files, or anyone who needs to work with JSON data, this tool makes it easy to format, validate, and minify JSON instantly.

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 data exchange on the web.

Features of Our JSON Formatter

Format JSON

Transform messy, unformatted JSON into beautifully indented, readable code. Choose between 2-space or 4-space indentation based on your preference.

Minify JSON

Compress your JSON by removing all unnecessary whitespace and line breaks. Perfect for reducing file sizes in production or when sending data over the network.

Validate JSON

Instantly check if your JSON is valid. Our validator will pinpoint exactly where syntax errors occur, making debugging quick and easy.

JSON Statistics

Get insights about your JSON data including:

• Total number of keys
• Maximum nesting depth
• File size

How to Use the JSON Formatter

1. Paste your JSON into the input field
2. Click Format to beautify the JSON with proper indentation
3. Click Minify to compress the JSON into a single line
4. Click Validate to check if the JSON is valid
5. Copy the result with one click

Common JSON Errors

Missing Quotes

All keys in JSON must be wrapped in double quotes:

• ❌ {name: "John"}
• ✓ {"name": "John"}

Trailing Commas

JSON doesn't allow trailing commas:

• ❌ {"name": "John",}
• ✓ {"name": "John"}

Single Quotes

JSON requires double quotes, not single quotes:

• ❌ {'name': 'John'}
• ✓ {"name": "John"}

Why Use Our JSON Formatter?

• 100% Free - No registration or subscription required
• Privacy First - All processing happens in your browser
• Fast & Reliable - Instant formatting with no server delays
• Works Offline - Once loaded, works without internet
• Mobile Friendly - Use on any device

Use Cases

API Development

Format API responses for easier debugging and analysis.

Configuration Files

Make JSON config files readable and maintainable.

Data Analysis

Validate and format JSON data before processing.

Learning

Understand JSON structure with properly formatted output.

JSON Best Practices

1. Use meaningful key names that describe the data
2. Keep nesting levels reasonable (max 3-4 levels)
3. Validate JSON before deploying to production
4. Use minified JSON for production to reduce bandwidth

Format your JSON with confidence using our free online tool!