Free Online JSON Formatter

JSON Formatter

JSON, or JavaScript Object Notation, is a lightweight format commonly used for storing and exchanging structured data. JSON is widely used by websites, APIs and applications.

When JSON contains little or no whitespace, it can be difficult to read. A JSON formatter adds indentation and line breaks, making the structure much easier to understand.

What does a JSON formatter do?

A JSON formatter takes valid JSON and reorganizes its appearance using indentation and line breaks. The underlying data remains unchanged.

For example, compact JSON such as {"name":"John","age":30} can be formatted into a more readable structure.

How to format JSON

Paste your JSON into the input box above and click Format . The formatter will check that the JSON is valid and display it with readable indentation.

How to validate JSON

JSON must follow a specific syntax. Missing quotation marks, brackets, commas or other characters can make JSON invalid.

Click Validate to check whether your JSON is syntactically valid. If there is an error, the tool will display a message explaining where the problem occurred.

What is JSON minification?

JSON minification removes unnecessary whitespace and line breaks from JSON. This produces a smaller representation that can be useful when transferring data between applications.

Click Minify to remove unnecessary formatting while keeping the JSON data intact.

Common JSON errors

• Using single quotes instead of double quotes
• Missing commas between properties
• Missing quotation marks around property names
• Unclosed brackets or braces
• Trailing commas after the final property
• Using invalid JSON values

Is this JSON formatter free?

Yes. This JSON formatter is completely free to use and does not require an account or registration.

Your JSON is processed directly in your browser and is not uploaded to a server by this tool.