JSON Formatter & Validator
Format, validate, and beautify JSON data instantly in your browser. Supports minify and syntax checking. Free, 100% private.
Formatted output will appear here...Features
100% Browser-Based
All processing happens in your browser. Your data never leaves your device.
Free & No Sign Up
No registration, no limits, no hidden fees. Just open and use.
Instant Results
Real-time formatting and validation as you type, zero waiting.
Real-time Validation
Instant syntax checking with line-by-line error highlighting.
Frequently Asked Questions
Is my JSON data sent to any server?
No. All formatting and validation happens entirely in your browser using JavaScript. Your data never leaves your device.
What is JSON formatting?
JSON formatting (or beautification) adds proper indentation and line breaks to compact JSON, making it readable by humans while remaining valid for machines.
Can I minify JSON with this tool?
Yes. You can both beautify (format with indentation) and minify (remove whitespace) JSON data, switching between the two modes with one click.
What happens if my JSON is invalid?
The validator will highlight the exact line and position of the syntax error, helping you quickly locate and fix the issue.