JSON Formatter & Validator
Format, validate, beautify and minify JSON data online with precise error location. Works entirely in your browser.
Privacy: This tool runs entirely in your browser. Your data never leaves your device and is never uploaded to any server.
Formatted output will appear here.
Frequently asked questions
What is a JSON formatter?
A JSON formatter takes messy or minified JSON and reformats it with consistent indentation so it is easy to read and debug.
Is my JSON data uploaded to a server?
No. All formatting and validation happens locally in your browser. Your data never leaves your device.
How do I fix invalid JSON?
The validator reports the exact line and column of the first syntax error, so you can jump straight to the problem.