Paste JSON
Output appears here as you type - everything stays on this page.
Frequently asked questions
Is it safe to paste API responses with tokens or secrets?
Yes, structurally: parsing and formatting happen in your browser with JavaScript's built-in JSON engine, and nothing you paste is transmitted or logged. That's a real difference from formatter sites that process on a server.
How do I find where my JSON is invalid?
Paste it and the validator reports the exact line and column of the first syntax error, like a trailing comma or an unquoted key. Fix it and the output updates instantly.
What's the difference between formatting and minifying?
Formatting adds indentation and line breaks for humans. Minifying strips all whitespace for machines, making the payload smaller. The byte counts for both are shown under the output.