Format, validate and beautify your JSON data with proper indentation
Paste messy or minified JSON and get it formatted, indented and validated instantly. If there's a syntax error, you'll see where it is — which is usually the whole reason you came looking for a formatter.
JSON is the format APIs speak in, and it arrives as a single unreadable line. Formatting reveals the structure so you can actually see nested objects and arrays. Developers use this constantly when debugging API responses, inspecting configuration files, checking webhook payloads, reviewing database exports or verifying that a JSON file is valid before deploying it.
The most common JSON errors are simple: a trailing comma after the last item, single quotes instead of double quotes, missing braces, or unescaped characters inside strings. JSON is strict about all of these, unlike JavaScript. Validation here runs entirely in your browser, so API keys and production data in your payload never leave your machine.