JavaScript Formatter & Beautifier

About JavaScript Formatting

Why Format JavaScript?

Properly formatted JavaScript is essential for readability, debugging, and team collaboration. Clean code helps prevent errors and makes maintenance significantly easier.

Key Features

• Beautification: Adds proper indentation and spacing for readability
• Minification: Removes whitespace and comments to reduce file size
• Syntax Validation: Detects basic syntax errors before runtime
• Syntax Highlighting: Color-codes keywords, strings, and functions
• Line Numbers: Helps navigate and debug code

JavaScript Best Practices

• Use consistent indentation (2 or 4 spaces)
• Always use semicolons to avoid ASI issues
• Use const and let instead of var
• Follow a consistent naming convention (camelCase for variables)
• Add comments for complex logic
• Keep functions small and focused
• Minify production code for performance

Common Syntax Errors

• Missing or mismatched brackets/parentheses
• Missing semicolons (in strict mode)
• Undefined variables or functions
• Incorrect arrow function syntax
• Missing commas in object literals

When to Use This Tool

• Before committing code to version control
• When debugging minified production code
• To standardize code formatting across your team
• When learning JavaScript syntax
• To optimize JavaScript for production deployment