JSON Formatter & Validator

Format, beautify and validate JSON with syntax error detection and instant feedback.

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Frequently asked questions

Does this validate JSON?
Yes. If your JSON is invalid, the tool will show the exact error message and position so you can fix it quickly.
Is my JSON data private?
Yes. All processing happens in your browser. Your JSON is never sent to the server.
What is the maximum JSON size?
The tool handles JSON up to several MB in most browsers. For very large files, performance depends on your device.