Free JSON Formatter & Validator

Format, validate, and beautify JSON. Free, fast, and private—all processing happens in your browser.

Formatted JSON will appear here...
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JSON (JavaScript Object Notation) is the de facto standard for data exchange in modern web applications. Our formatter helps you work with JSON more effectively by beautifying, validating, and transforming JSON data.

Features

**Beautify/Format**: Convert minified JSON into readable, indented format with proper line breaks.

**Validate**: Instantly detect syntax errors with clear error messages and line numbers.

**Minify**: Remove whitespace and reduce JSON size for production use.

**Syntax Highlighting**: Color-coded display makes it easy to distinguish strings, numbers, booleans, and keys.

JSON Best Practices

- Always validate JSON before using it in production - Use consistent indentation (2 or 4 spaces) - Keep keys in consistent order for easier comparison - Avoid trailing commas (invalid in JSON, unlike JavaScript)

Frequently Asked Questions

What is JSON?

JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It's human-readable and widely supported across programming languages.

What does this tool do?

Our JSON formatter beautifies minified JSON for readability, validates syntax to catch errors, and can minify formatted JSON for production use.

Is my JSON data secure?

Yes, all processing happens in your browser. Your JSON data never leaves your device or gets sent to any server.

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