Paste JSON to pretty-print or minify it and instantly catch syntax errors. Nothing is sent to a server.
Runs entirely in your browser — nothing you enter is uploaded or stored.
A JSON formatter beautifies (pretty-prints) or minifies JSON and validates it, flagging syntax errors with the parser message. Developers use it to read API responses, debug payloads and shrink config. Parsing happens in your browser, so even sensitive payloads stay local.