JSON Formatter

About JSON Formatter

Minified or hand-typed JSON — a single unbroken line from an API response, or a config file someone edited in a hurry — is close to unreadable, and squinting at nested braces to find a mismatched bracket is a bad use of anyone's time. The JSON Formatter takes any JSON input and pretty-prints it with consistent 2-space indentation, instantly, entirely in your browser, with the exact parse error shown clearly if the input isn't valid JSON at all. It's a daily tool for developers debugging an API response, reviewing a config file, or cleaning up JSON before pasting it into documentation or a bug report. The formatted result is one click away from being copied or downloaded as a file, so it fits naturally into a workflow that starts with a messy paste and ends with something clean saved or shared. Because nothing is sent to a server, it's also safe to use on JSON containing real data you wouldn't want to paste into a random web tool — API keys, internal config, anything sensitive stays exactly where it was, processed locally and never transmitted.