JavaScript Formatter | Beautify JS Code Online
Format and beautify JavaScript code with customizable indentation using Prettier. Real-time formatting with ES6+ support, semicolons, quotes, and trailing commas options. Fast, private, and 100% in-browser.
How to Use This Tool
- 1
Paste or type your JavaScript code into the input area.
- 2
Adjust formatting options (semicolons, quotes, trailing commas, indentation).
- 3
See the formatted code appear in real-time (Live mode) or click Format (Manual mode).
- 4
Copy or download the beautifully formatted result.
Use Cases & Examples
Clean Up Minified JavaScript
Quickly format minified or compressed JS from production builds for debugging and inspection.
Enforce Code Style
Ensure consistent formatting across team projects with standardized semicolons, quotes, and indentation.
Learning & Education
Understand JavaScript structure better with properly formatted and indented code examples.
Code Review & Refactoring
Format legacy code or third-party libraries to match your project's style guide.
How JavaScript Formatting Works
Uses Prettier with Babel and Estree plugins to format JavaScript according to best practices.
Automatically handles indentation, semicolons, quotes, and trailing commas based on your preferences.
Processes code entirely in your browser for fast performance and privacy.
Supports ES6+, JSX, TypeScript (basic), and modern JavaScript features.
Frequently Asked Questions
Q.Is my JavaScript code sent to a server?
A. No. All formatting happens locally in your browser using Prettier. Your code never leaves your device.
Q.Does this support ES6+ and modern JavaScript?
A. Yes, it fully supports ES6+, including arrow functions, async/await, destructuring, template literals, and more.
Q.Can I customize the code style?
A. Yes, you can configure semicolons, single/double quotes, trailing commas, tab width, and print width to match your preferences.
Q.Will this fix JavaScript errors?
A. The formatter will try to format your code, but it won't fix syntax errors. Invalid JavaScript may cause formatting to fail.
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