JavaScript Formatter & Beautifier
Note: This is a basic formatter that adds indentation and line breaks. For production-grade formatting with advanced options, consider using tools like Prettier. Use our JavaScript Minifier if you need to compress code for production.
About JavaScript Formatter
JavaScript formatting makes your code more readable by adding proper indentation, line breaks, and spacing. Well-formatted JavaScript is easier to maintain, debug, and collaborate on. This tool beautifies messy or minified JavaScript by organizing code with consistent indentation based on nesting level, adding spaces around operators and after keywords, and separating statements with line breaks. It's perfect for developers working with minified JavaScript or who need to improve code readability. All formatting happens in your browser for complete privacy.
How to Use
- Paste or type your JavaScript into the input field.
- The tool will automatically format your code after a brief pause.
- Click "Format" to manually trigger formatting.
- Adjust the indent size (2, 4, or 8 spaces) to match your preferences.
- Click "Copy" to copy the formatted JavaScript to your clipboard.
- Use the formatted code in your projects for better readability.
Frequently Asked Questions
What is JavaScript formatting?
JavaScript formatting, also known as beautifying or pretty-printing, is the process of adding indentation, line breaks, and whitespace to JavaScript code to make it more readable and maintainable. It organizes code structure with consistent spacing and makes the logic flow clear at a glance.
When should I format JavaScript?
Format JavaScript during development and debugging when readability matters. If you're working with minified JavaScript from production or third-party libraries, formatting it makes it easier to understand and debug. Well-formatted code is essential for code reviews, maintenance, and team collaboration.
Will formatting change how my code works?
No! Formatting only adds whitespace, line breaks, and indentation which JavaScript engines completely ignore. Your code will function identically before and after formatting. However, always test formatted code to ensure nothing broke, especially with unusual syntax.
Can I customize the indentation?
Yes! Use the "Indent" dropdown to choose between 2, 4, or 8 spaces per indentation level. This allows you to match your team's coding standards or personal preferences for consistent formatting across your project.
How does this compare to Prettier or ESLint?
This is a basic formatter for quick beautification. Professional tools like Prettier offer advanced formatting with many options, and ESLint provides linting with auto-fix. For production projects, use those tools. This formatter is great for quick formatting of snippets or understanding minified code.
Does this tool validate JavaScript syntax?
This is a formatting tool, not a validator or linter. It will attempt to format any code you provide, but it doesn't check for syntax errors, runtime issues, or best practices. Use browser consoles, ESLint, or other validators for syntax checking.
Will it format TypeScript or JSX?
This tool is designed for standard JavaScript. It may partially format TypeScript or JSX, but it doesn't understand TypeScript types or JSX syntax specifically. For those, use language-specific formatters like Prettier.
How does this differ from minification?
Formatting adds whitespace, indentation, and line breaks to improve readability (for development). Minification removes whitespace to reduce file size (for production). They're opposites—use our JavaScript Minifier when you need to compress code for production use.
Is my code secure?
Yes! All JavaScript formatting happens entirely in your browser. Your code is never sent to any server, ensuring complete privacy. The tool works offline once loaded.