JSON Formatter
Format, validate and minify JSON in one click.
// formatted JSON appears here
About this tool
The JSON Formatter validates, pretty-prints and minifies JSON. Format expands your data with two-space indentation for easy reading; Minify strips all whitespace for the smallest possible payload. Invalid JSON shows the exact parser error so you can fix it fast.
Developers use it daily to inspect API responses, debug configuration files and prepare compact payloads. Validation uses the browser's native JSON parser, so results match exactly what JavaScript itself would accept.
Frequently asked questions
Yes. Parsing and formatting run locally in your browser — useful when working with sensitive API data that must not be pasted into online services.
The most common culprits are trailing commas, single quotes instead of double quotes, and unquoted keys. The error message points to the position of the problem.
No — only insignificant whitespace is removed. The parsed result is byte-for-byte equivalent.