Free JSON Formatter & Validator

Paste messy or minified JSON and instantly format it into clean, readable, indented code — with validation.

What This Tool Does

This JSON formatter takes raw, minified, or messy JSON data and reformats it with proper indentation and line breaks, making it far easier to read and debug. It also validates the JSON and tells you immediately if there's a syntax error.

Useful for developers working with APIs, configuration files, or any data interchange that uses JSON. Everything runs locally in your browser — your data is never sent anywhere.