Paste your JavaScript code to format it, making it readable and easier to understand.
Input
Output
About the JavaScript Beautifier Tool
Our advanced JavaScript Beautifier transforms minified or compressed JavaScript into clean, readable code. Add proper indentation, line breaks, and formatting to make your scripts maintainable and easier to debug.
JavaScript Beautification Benefits
Code Readability: Transform unreadable minified code into clean format
Debugging Aid: Easier to set breakpoints and trace execution
Code Analysis: Study and understand complex JavaScript logic
Maintenance: Easier to modify and update existing code
Learning Tool: Understand JavaScript patterns and techniques
Advanced Formatting
Smart Indentation: Proper nesting for functions and blocks
Line Break Logic: Strategic placement of statements
Brace Styling: Consistent brace placement and formatting
Operator Spacing: Proper spacing around operators
Comment Preservation: Maintains existing comments
Perfect For
Library Analysis
Study minified JavaScript libraries like jQuery, React, or Vue to understand their implementation.
Code Recovery
Recover readable format from minified code when source files are unavailable.
Development Debug
Format compressed JavaScript for easier debugging and development workflows.
JavaScript Beautification Tips
✅ Best Practices:
• Use beautified JS for development and debugging
• Verify functionality after beautification
• Use consistent formatting across team projects
• Combine with ESLint for code quality
• Set up automatic formatting in your IDE
• Maintain source maps for production debugging
⚠️ Important Notes:
• Beautification cannot recover original variable names
• Some code logic may remain unclear after minification
• Always test beautified code thoroughly
• Be aware of potential licensing issues
• Consider using source maps when available
• Beautified code may not match original formatting
Before & After Example
❌ Before (Minified JS):
function a(b){return b*2}var c=a(5);console.log(c);
✅ After (Beautified JS):
function a(b) {
return b * 2
}
var c = a(5);
console.log(c);
Powered by js-beautify
Our JavaScript beautifier uses the trusted js-beautify library, which is used by millions of developers worldwide. It provides intelligent formatting that respects JavaScript syntax and best practices.
