JavaScript Formatter

What is JavaScript Formatting?

JavaScript code can become difficult to read and maintain when minified or poorly formatted. Formatting JavaScript adds proper indentation, line breaks, and consistent spacing to make the code readable and maintainable. This is essential for debugging, collaboration, and maintaining clean codebases.

This tool takes any JavaScript code and formats it with consistent indentation. It handles functions, loops, conditionals, objects, and arrays, making the code easy to read and edit.

All processing is done locally in your browser – your code never leaves your device.

How to Use

Step 1: Paste your JavaScript code into the input area. This can be minified or already formatted.
Step 2: Select your preferred indentation size (2 spaces, 4 spaces, or 8 spaces).
Step 3: Click "Format JavaScript". The tool beautifies the code.
Step 4: Copy the formatted JavaScript using the "Copy JS" button.

The formatter handles ES6+ syntax including arrow functions, template literals, and destructuring.

Examples

Input (minified):
function add(a,b){return a+b;}const result=add(5,3);console.log(result);
Output (formatted with 2 spaces):

function add(a, b) {
  return a + b;
}
const result = add(5, 3);
console.log(result);

Who Uses JavaScript Formatters?

• Web Developers – maintaining clean code.
• Front-End Engineers – debugging JS issues.
• Back-End Developers – formatting Node.js code.
• Students – learning JavaScript syntax.
• Open Source Contributors – adhering to style guides.

Pro Tips

• Use 2 spaces for compact formatting, 4 spaces for standard readability.
• Formatted code is easier to review in code reviews and version control.
• The formatter adds semicolons where missing for consistency.
• For React JSX code, use the HTML to JSX converter first.
• Always keep a backup of your original code before formatting.

Frequently Asked Questions