JSON formatter & validator online

Paste JSON to pretty-print it, minify it or find exactly where it is broken.

Free, no limits Runs in your browser No sign-up Sign in only to save

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How to use JSON formatter

Paste your JSON.
Click “Format”, “Minify” or “Validate”.
Copy or save the result.

Frequently asked questions

Is my JSON sent anywhere?

No – it is processed in your browser.

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