JSON Formatter & Validator
Format, validate, and beautify your JSON data with syntax highlighting.
How to Use JSON Formatter
- Paste or type your JSON data in the input area
- Choose your preferred indentation size (2 or 4 spaces, or tabs)
- Click "Format & Validate" to beautify and check your JSON
- Copy the formatted result or download it as a file
About JSON Formatter
This JSON formatter helps you format and validate JSON data quickly. It automatically detects errors, provides line numbers for debugging, and formats your JSON for better readability. All processing happens in your browser - your data never leaves your device.
Frequently Asked Questions
JSON (JavaScript Object Notation) is a lightweight data format used for storing and exchanging data. It's easy for humans to read and write, and easy for machines to parse and generate.
Yes! All JSON processing happens entirely in your browser. Your data never leaves your device or gets sent to any server.
Yes, but very large files (over 10MB) may slow down your browser. For best performance, use files under 5MB.