Paste JSON below to format it, validate it, or shrink it down — all in your browser.
Paste your JSON into the input box and click Format. The tool validates the syntax and, if it's valid, displays a clean, properly indented version. If there's an error, it tells you exactly what's wrong instead of just failing silently.
Minify removes all unnecessary whitespace and line breaks, producing the smallest valid version of the same JSON — useful when you need to paste it somewhere compact, like a config value or API payload.
No. Parsing and formatting happen entirely in your browser using standard JavaScript. Nothing is uploaded, which makes this safe for JSON containing sensitive configuration or data.
Need something else? See the full tools homepage.