JSON Formatter & Validator
Paste JSON below to pretty-print it with 2-space indentation and syntax highlighting, or minify it to a single line. Invalid JSON shows the exact parse error. Nothing leaves your browser.
About this JSON formatter
This tool uses your browser's native JSON.parse and JSON.stringify, so validation matches exactly what real applications accept. Formatting produces 2-space indented output; minifying strips all insignificant whitespace for compact payloads. Because everything runs client-side, it is safe to use with data you would not paste into an online service.