JavaScript Beautifier

Beautify, validate and minify your JavaScript code with proper indentation and formatting using our JavaScript Beautifier tool

What is JavaScript?

JavaScript is a versatile, high-level programming language primarily used to create interactive and dynamic content on websites. It runs in web browsers as well as on servers via environments like Node.js.

JavaScript code consists of statements, expressions, functions, and control structures that enable you to manipulate web pages, handle events, and communicate with servers.

Example:

const user = {
  name: "Prettify Code",
  url: "https://prettifycode.com",
  message: "I love prettifycode.com!",
  features: ["Beautify", "Minify", "Validate"],
  user: {
    type: "developer",
    happy: true
  }
};

console.log(`Welcome, ${user.name}!`);

JavaScript is widely used for front-end web development, backend servers, automation scripts, and more due to its flexibility and ubiquity.

What is a JavaScript Beautifier?

A JavaScript Beautifier is a tool that formats raw or minified JavaScript code into a clean, readable structure with proper indentation, spacing, and line breaks. This makes it easier to:

  • Understand and debug complex scripts
  • Spot syntax errors or missing brackets
  • Share clean and maintainable code with others
  • Work with compressed or minified JavaScript files

If you receive or work with compacted JavaScript (e.g., minified production code), a beautifier helps you restore readability instantly.

Why Prettify Code JavaScript Beautifier?

There are many JavaScript beautifiers online, but Prettify Code's tool is specially designed for developers who want:

  • Fast & Lightweight – Format JavaScript instantly in your browser
  • Client-Side & Secure – Your code never leaves your device
  • Dark & Light Mode – Comfortable reading day or night
  • One-Click Copy – Copy beautified code easily
  • Multiple Local Saves – Save and load multiple code snippets locally
  • No Ads or Clutter – Focus on coding, no distractions
  • Mobile-Optimized – Beautify JavaScript on the go
  • Part of a Full Dev Toolkit – Explore more tools at PrettifyCode.com

Save and Load JavaScript Locally

Worried about losing your work after refreshing or closing your browser?

Prettify Code JavaScript Beautifier lets you:

  • Save multiple versions of your code to local storage
  • Load them anytime without re-pasting
  • Edit or overwrite saved snippets easily
  • Delete old code snippets you no longer need

All your data stays private in your browser — nothing is uploaded to any server.

How to Use JavaScript Beautifier

  • Paste or type your JavaScript code into the editor above
  • Click the "Beautify JavaScript" button (or press Cmd + Enter / Ctrl + Enter)
  • View the formatted output instantly with proper indentation
  • Copy or download the beautified code for your projects
  • Optionally, save your code locally or load previously saved snippets

Pro Tip

Use keyboard shortcuts like Cmd + Enter (Mac) or Ctrl + Enter (Windows/Linux) to quickly beautify your code without clicking the button.

This saves time and boosts productivity — especially when working with large or frequently updated JavaScript files.

JavaScript Beautifier FAQs

Common questions about our JavaScript formatting tool

How do I make my JavaScript code more readable online?

Paste your code into our JavaScript Beautifier, adjust formatting options like indentation size and brace style, then click "Beautify" to transform it into clean, well-structured code.

Can this tool handle ES6+ JavaScript syntax?

Yes, our JavaScript Beautifier fully supports modern JavaScript syntax including ES6+ features like arrow functions, classes, and template literals.

Does the JavaScript formatter preserve comments?

Yes, our tool maintains all comments in your code while improving the formatting, ensuring documentation remains intact.

Can I use keyboard shortcuts in the JavaScript editor?

Absolutely! Our editor supports common keyboard shortcuts like Ctrl+Z for undo, Ctrl+Y for redo, and Ctrl+F for find, making your formatting experience more efficient.

Can I format minified or obfuscated JavaScript?

Yes! Our tool excels at transforming minified JavaScript into readable code. Note that heavily obfuscated code may retain complex variable names though the structure will be improved.

Will beautifying my code affect its performance?

No. Beautifying only affects whitespace and formatting which is ignored when JavaScript runs. For production, you might want to minify again, but during development, beautified code is much easier to work with.

Does the tool fix syntax errors in my JavaScript?

While our tool highlights syntax issues, it's designed for formatting rather than fixing code logic. It will help you identify problems more easily through better formatting.