JSON Formatter & Validator

Format, validate, and minify JSON data instantly. Beautify messy JSON with configurable indentation.

Understanding JSON Format

JSON (JavaScript Object Notation) is a lightweight data interchange format that is easy for humans to read and write, and easy for machines to parse and generate. It is used in virtually every modern web API, configuration file, and data storage system.

This tool helps you format (beautify) messy or minified JSON with proper indentation for readability, validate JSON structure by catching syntax errors with descriptive messages, and minify JSON by removing all whitespace for production payloads. All processing happens in your browser — your data never leaves your device.

Frequently Asked Questions

Can I validate JSON with this tool?

Yes. The tool parses your input and highlights syntax errors with line numbers and descriptive messages so you can fix issues quickly.

Is there a size limit?

No hard limit. Processing happens in your browser, so performance depends on your device. Files up to several MB work smoothly.

Can I minify JSON?

Yes. Click the Minify button to strip all whitespace and produce the smallest possible JSON string for API payloads or config files.

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