JSON Formatter & Validator

What is a JSON formatter and validator?

A JSON formatter takes minified or messy JSON and reformats it with proper indentation so it's easier to read and debug. This tool also validates your JSON in real time and tells you exactly where a syntax error occurs — such as a missing comma or an unclosed bracket — as you type, and lets you minify JSON back down for production use.

This is a common task when working with REST APIs, config files, or JavaScript objects. Everything runs directly in your browser using the native JSON.parse engine, so nothing you paste here is ever sent to a server.