Online Code Formatter

Instantly beautify and format your code for JavaScript, JSON, HTML, CSS, and more. 100% client-side.

Choose Language: Paste or type your code below:

Formatted Output:

How to Use the Code Formatter

Choose the programming language from the dropdown menu (JSON, JavaScript, HTML, CSS, XML).

Language: JavaScript

Copy and paste your unformatted or minified code into the input textarea.

function hello(){console.log("world");}

Click the "Format Code" button to beautify and indent your code according to language standards.

Use the copy button in the output area to copy the formatted code to your clipboard.

Format your code before submitting for code review to ensure consistent indentation and readability.

Before:

function calculateTotal(items){return items.reduce((sum,item)=>sum+item.price,0);}

After:

function calculateTotal(items) {
  return items.reduce((sum, item) => sum + item.price, 0);
}

Format minified JavaScript or CSS files to make them readable for debugging and maintenance.

Minified CSS:

.header{background:#fff;padding:1rem}.nav{display:flex}

Format JSON responses from APIs to make them easier to read and understand the data structure.

API Response:

{"user":{"id":123,"name":"John","active":true}}

Our formatter supports JavaScript, JSON, HTML, CSS, XML, and more. Each language has its own formatting rules for proper indentation and structure.

Yes! All code formatting happens locally in your browser. Your code never gets sent to our servers, ensuring complete privacy and security.

Yes, our tool can handle large code files. However, for very large files, we recommend using a local code editor for better performance.

Our formatter focuses on code structure and indentation. Some comments may be reformatted, but the functionality remains intact.

After formatting your code, use our JSON Validator to ensure JSON is valid, or try the Diff Checker to compare your formatted code with the original.