Free online JSON toolkit. Format, validate, minify, compare, and repair JSON data. All processing happens locally in your browser for maximum privacy and security.
Input JSONLines: 1
OutputLines: 1
Frequently Asked Questions
What is JSON and why do I need to format it?
JSON (JavaScript Object Notation) is a lightweight data format used for data exchange. Formatting makes JSON readable with proper indentation and line breaks, while minifying compresses it by removing whitespace for faster transmission.
Is my data secure?
Yes! All processing happens locally in your browser. Your JSON data never leaves your device and is not sent to any server.
What does validation tell me?
JSON validation checks if your JSON syntax is correct. It will highlight errors like missing quotes, trailing commas, or mismatched brackets.
Can I compare two JSON files?
Yes! Click the "Compare JSON" button to show a second input panel. Enter your second JSON and click "Compare" to see the differences highlighted.