JavaScript Formatter & Beautifier

Format and beautify JavaScript code online for free

What is JavaScript Formatter?

The JavaScript Formatter is a free online tool that beautifies and minifies JavaScript code instantly in your browser, making minified or obfuscated JS readable and properly indented. JavaScript from CDN libraries, production bundles, or third-party scripts is typically minified into a single dense line that is impossible to read or debug. This tool reformats that code with correct indentation, line breaks, and spacing so you can understand the logic, find bugs, and make modifications. It also minifies JavaScript for production deployment, removing all whitespace and comments to reduce file size and improve page load performance. Supports modern JavaScript including ES6, ES7, arrow functions, template literals, destructuring, and async/await syntax. All processing is done locally in your browser with no data sent to any server.

Why Use DevBench JavaScript Formatter?

DevBench JavaScript Formatter runs entirely in your browser — your data never leaves your device. No sign-up, no limits, no watermarks, completely free forever.

How to Use JavaScript Formatter

  1. Paste JavaScript code into the input textarea
  2. Click "Format" to beautify and indent JavaScript
  3. Click "Minify" to compress JavaScript by removing whitespace
  4. View formatted output with proper indentation
  5. Copy formatted JavaScript using Copy button

Examples

  • Format minified JavaScript from build tools
  • Beautify JavaScript for code review
  • Format JavaScript for documentation
  • Minify JavaScript to reduce file size
  • Format JavaScript from browser console

Use Cases

  • Formatting minified JavaScript for debugging
  • Beautifying JavaScript for code review
  • Formatting JavaScript for documentation
  • Minifying JavaScript for production
  • Formatting JavaScript from browser DevTools
  • Debugging JavaScript syntax errors
  • Beautifying JavaScript from CDN libraries
  • Formatting JavaScript for learning
  • Minifying JavaScript to improve page speed
  • Formatting JavaScript for version control

Frequently Asked Questions

Does it validate JavaScript syntax?

It formats JavaScript structure but does not validate syntax. Use ESLint for comprehensive validation.

Does it support ES6+ syntax?

Yes, it supports modern JavaScript including ES6, ES7, and newer syntax features.

Can it format TypeScript?

It can format basic TypeScript, but use TypeScript-specific formatters for best results.

Does it format JSX/React?

It can format basic JSX, but use Prettier or ESLint for comprehensive React formatting.

Does minification rename variables?

No, this tool only removes whitespace. For variable renaming, use UglifyJS or Terser.

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