JSON Formatter & Validator

How to format JSON

Paste your JSON into the left box. The formatter validates and prettifies it automatically. If your JSON is invalid, the exact error is shown below the input.

What does the JSON formatter do?

• Validates — checks that your JSON is syntactically correct.
• Beautifies — adds indentation and line breaks to make it readable.
• Minifies — strips all whitespace for the smallest file size.

Common JSON errors

• Trailing comma after the last item in an object or array
• Single quotes instead of double quotes around keys or strings
• Unquoted property names
• Missing comma between key-value pairs

Is my JSON secure?

Yes. All processing happens in your browser using JavaScript's built-in JSON.parse(). Your data is never sent to a server.