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JavaScript Formatter

Format JavaScript code, fix indentation, and make it readable with this client-side beautifier.

Free JavaScript Beautifier

Make your JS code readable instantly. Our online JavaScript formatter handles modern ES6+ syntax, ensuring proper indentation and structure.

  • Secure: Code never leaves your browser. Logic stays private.
  • Modern JS: Supports arrow functions, classes, and async/await syntax.
  • Error Checking: Highlights basic syntax errors while formatting.
  • Fast: Formats thousands of lines of code in milliseconds.

How to Beautify JS

Clean your script in 3 steps:

  1. Paste: Input your minified or messy JS code.
  2. Beautify: Click the format button to process the code.
  3. Use: Copy the clean, indented result for your project.

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Frequently Asked Questions

No, your JavaScript code never leaves your device. All formatting happens directly in your web browser, keeping your application code, API integrations, and business logic completely private.

Yes, this tool is completely free with no limits. Format as much JavaScript as you need without creating an account or paying anything.

This formatter supports modern JavaScript including ES6+ syntax, arrow functions, async/await, classes, modules, and other contemporary features.

Yes! Once this page loads in your browser, you can disconnect from the internet and continue formatting JavaScript. All processing happens locally on your device.

This tool focuses on beautifying and formatting JavaScript for readability. For minification (reducing file size for production), you may want to use a dedicated JavaScript minifier.