Online JSON Formatter
Free tool to format and validate JSON. Pretty print, error highlighting, and quick copy.
Formatted JSON will appear here...
About JSON Formatter
Our JSON Formatter helps developers and data analysts quickly transform unreadable JSON strings into a structured and readable format. Simply paste your code and get the result instantly.
The tool works entirely in your browser. Your data is never sent anywhere, ensuring complete privacy and security when working with sensitive information.
Benefits
Instant
Formatting happens instantly without page reload.
Validation
Automatic syntax check and error highlighting.
Privacy
Your data is processed locally and never leaves your device.
FAQ
Is it safe?
Yes, your data is processed only in your browser.
Is there a size limit?
The limit depends only on your browser's performance.
What standard is used?
We use standard JSON (RFC 8259).