JSON Formatter & Validator

Format, validate, and minify JSON instantly in your browser.

Input

Output

FAQ

What is JSON formatting?

JSON formatting (or "pretty printing") adds consistent indentation and line breaks to make JSON data human-readable. Minifying does the opposite — removing whitespace to reduce file size.

Is my data sent to a server?

No. All JSON processing happens entirely in your browser using JavaScript. No data is transmitted to any server.

What does the validator check?

It checks that your JSON is syntactically valid — correct brackets, quotes, commas, and value types. It will report the error message if the JSON is invalid.