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JSON Formatter & Validator

Beautify, minify and validate JSON instantly. Nothing leaves your browser.

Why format JSON?

Raw JSON from APIs is often minified — everything on one line. Beautifying adds consistent indentation so the structure is immediately clear and mistakes become obvious at a glance.

Private by design

All formatting and validation happens inside your browser. Your JSON is never sent to a server, which makes this safe for internal API payloads and config files that may contain sensitive keys.

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Everything below runs in your browser — private, fast and free.