JavaScript Beautifier

What JavaScript Beautification Does

• Adds proper indentation: Based on code blocks and nesting levels
• Formats braces and parentheses: Consistent spacing around and ()
• Adds line breaks: Separates statements and function declarations
• Standardizes spacing: Around operators, commas, and colons
• Preserves comments: Keeps // and /* */ comments in place

Example Transformation

/* Before (Minified) */
function calculate(a,b){let sum=a+b;let product=a*b;return{sum:sum,product:product};}

/* After (Beautified) */
function calculate(a, b) {
  let sum = a + b;
  let product = a * b;
  return {
    sum: sum,
    product: product
  };
}
        

Best Practices

• Use 2-space indentation: Most common in JavaScript community
• Keep lines under 80 chars: For better readability
• Use consistent brace style: Same line opening braces
• Minify for production: Use minified code in live websites
• Beautify for development: Readable code is maintainable code

Syntax Validation

The validator uses JavaScript's eval() in a sandboxed way to check for syntax errors. No code is executed - only parsed to ensure it's valid JavaScript syntax. All processing happens locally in your browser for maximum privacy.