Text-Tools

JavaScript Beautifier / Formatter

Format and beautify JavaScript code.

100% Private - Your text never leaves your browser
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About JavaScript Beautifier / Formatter

Pretty print JavaScript with proper indentation, line breaks, and formatting. This free online tool processes your text instantly in your browser - no data is ever sent to any server, ensuring complete privacy.

How to Use JavaScript Beautifier / Formatter

  1. Paste or type your text in the input field on the left
  2. The result appears automatically in the output field
  3. Adjust any options below the text fields if available
  4. Click "Copy Result" to copy the output to your clipboard
  5. Use "Download" to save the result as a text file

Features

  • ✓100% Free - No registration required
  • ✓Instant processing as you type
  • ✓Complete privacy - works offline
  • ✓No file size limits
  • ✓Works on all devices
  • ✓Download results as text file

Why Use Our JavaScript Beautifier / Formatter?

Unlike other online tools that require uploads or send your data to servers, our javascript beautifier / formatter runs entirely in your browser using JavaScript. This means your sensitive text never leaves your computer, making it perfect for processing confidential documents, personal information, or any text you want to keep private. The tool is also lightning-fast since there's no network latency involved.

When to Use This Tool

Unminify JavaScript

Convert minified JS back to readable code for debugging and understanding.

Code Review

Format poorly styled code to consistent standards for easier review.

Reverse Engineering

Make obfuscated or minified library code readable for learning.

Legacy Code Cleanup

Standardize formatting in old codebases for better maintainability.

Examples

Minified Code

function add(a,b){return a+b}var x=add(1,2);
function add(a, b) {
  return a + b;
}
var x = add(1, 2);

💡 Proper indentation and line breaks restored

Chained Methods

arr.map(x=>x*2).filter(x=>x>5).reduce((a,b)=>a+b)
arr
  .map(x => x * 2)
  .filter(x => x > 5)
  .reduce((a, b) => a + b)

💡 Method chains formatted for readability

Common Mistakes to Avoid

⚠️

Breaking working code

Solution: Beautifiers should not change logic, but test after formatting. Edge cases with semicolon insertion can cause issues.

⚠️

Inconsistent with team style

Solution: Configure beautifier to match your ESLint/Prettier config. Default settings may differ from team standards.

⚠️

Not handling template literals

Solution: Template strings with embedded expressions may format unexpectedly. Verify output for complex templates.

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