Is my JSON sent anywhere?

No, formatting happens entirely in your browser. Nothing leaves your device.

Can it handle large payloads?

Yes, we've tested it on 10MB+ documents. For multi-gigabyte JSON, use a streaming tool.

Yes. JSON.stringify preserves insertion order in modern browsers.

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Paste compact JSON, get clean, indented output.

Input

Output

Pretty-printed JSON appears here…

Pretty-print JSON for readability. Indents with two spaces and validates structure as you type.

Questions, answered