Textoolz

JavaScript Formatter & Beautifier

Format and beautify JavaScript code online. Free JS formatter with configurable quotes, semicolons, and indentation options.

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The JavaScript Formatter & Beautifier takes minified, compressed, or poorly formatted JavaScript code and restructures it with clean indentation, consistent styling, and proper line breaks. Paste any valid JavaScript and get publication-ready code instantly.

Powered by Prettier with the Babel parser, this tool handles modern ES6+ syntax including arrow functions, template literals, destructuring, async/await, and JSX. Configure your preferred style: single or double quotes, with or without semicolons, and your chosen indent width.

All code formatting runs locally in your browser — your JavaScript is never sent to any server, making it safe for proprietary or sensitive code.

How to Use JavaScript Formatter & Beautifier

  1. 1Paste your JavaScript code into the input area above.
  2. 2Configure formatting options: indent size, quotes, semicolons, and print width.
  3. 3The formatted JavaScript appears instantly in the output area.
  4. 4Click the Copy button to copy the formatted code to your clipboard.

Frequently Asked Questions

What does the JavaScript formatter do?▾
The JavaScript formatter parses your code using Babel and reformats it with consistent indentation, line breaks, spacing, and your preferred code style — making it easy to read and maintain.
Does it support modern JavaScript syntax?▾
Yes. The formatter uses Prettier with the Babel parser, which supports all modern JavaScript features including ES6+ syntax, JSX, optional chaining, nullish coalescing, and more.
Can I customize the formatting style?▾
Yes. You can configure the indent size (2 or 4 spaces), choose single or double quotes, toggle semicolons on or off, and set the maximum line width before wrapping.
Will it fix syntax errors in my code?▾
No. The formatter requires valid JavaScript as input. If your code has syntax errors, you'll see an error message describing the problem. Fix the syntax error first, then format the code.