JSON Formatter / Validator Professional JSON Processing Tool

Format, validate, and beautify JSON data instantly. Perfect for developers working with APIs, configuration files, and data structures.

100%

Client-Side Processing

∞

Unlimited Formatting

RFC 8259

JSON Standard Compliant

24/7

Always Available

⚡ Instant Validation & Formatting

Paste your JSON and get instant validation with detailed error messages and beautifully formatted output.

JSON Input

0 characters Paste your JSON here

Formatting Options

Indentation

Sort Keys

Trailing Commas

Formatted Output

Enter JSON above to see formatted output...

0 characters Valid JSON format

Powerful JSON Processing Features

Real-time Validation

Instant JSON syntax validation with detailed error messages and line number references for quick debugging.

Smart Formatting

Beautiful JSON formatting with customizable indentation, key sorting, and formatting options for clean, readable code.

Tree Visualization

Interactive tree view for exploring complex JSON structures with collapsible nodes and syntax highlighting.

Minification

Compress JSON for production use by removing whitespace and unnecessary characters while preserving data integrity.

Copy & Download

Easy copy to clipboard functionality and download options for both formatted and minified JSON files.

Privacy First

All JSON processing happens in your browser. Your data never leaves your device, ensuring complete privacy and security.

Frequently Asked Questions

What is JSON and why do I need to format it?

JSON (JavaScript Object Notation) is a lightweight data interchange format that's commonly used for APIs, configuration files, and data storage. Formatting JSON makes it human-readable by adding proper indentation and line breaks, making it easier to understand, debug, and maintain.

How does the JSON validator work?

Our validator uses JavaScript's built-in JSON.parse() method to check your JSON syntax. It catches common errors like missing commas, incorrect quotes, malformed objects and arrays, and provides detailed error messages with suggestions for fixes.

Is my JSON data secure when using this tool?

Yes, all JSON processing happens locally in your web browser using JavaScript. Your data never leaves your device or gets sent to our servers, ensuring complete privacy and security.

Can I minify JSON for production use?

Absolutely! Our tool includes both formatting (beautification) and minification options. Minified JSON removes all unnecessary whitespace and line breaks, making files smaller for production environments while maintaining the exact same data structure.

What types of JSON errors can this tool detect?

The validator detects common JSON syntax errors including missing or extra commas, incorrect quotes (single instead of double), malformed objects and arrays, invalid escape sequences, trailing commas, and structural issues like unclosed brackets or braces.

Is this tool free to use?

Yes, our JSON formatter and validator is completely free to use. No registration required, no hidden fees, and no limitations on the size or number of JSON files you can process.