Code Beautifier

Beautify and format your HTML, CSS, and JavaScript code for better readability. Paste your code below and select the language to format.

Code Beautification

The opposite of minification - this adds proper indentation and line breaks to compressed or messily-formatted code. Takes that unreadable one-liner and turns it into something humans can parse.

Useful for reading minified code, cleaning up copy-pasted snippets, or enforcing consistent formatting. Works with HTML, CSS, and JavaScript.

What Gets Fixed

  • Consistent indentation (spaces or tabs)
  • Line breaks after statements
  • Proper bracket alignment

Understanding Code Beautification

Code beautification (or pretty-printing) transforms compact, minified, or poorly formatted code into human-readable form with proper indentation and spacing. This makes code easier to read, debug, and maintain. Different languages have different formatting conventionsJavaScript often uses 2-space indentation, while Java typically uses 4 spaces. Following consistent style guides improves team collaboration.

The opposite of beautification is minificationremoving unnecessary whitespace and comments to reduce file size. Production websites often serve minified code for faster loading, while development uses beautified code for debugging. Tools like Prettier, ESLint, and Beautify integrate into development workflows to automatically format code on save.

When Developers Actually Use This

The most common real-world scenario: you're debugging a production issue and you pull up the source of a third-party library or a compiled asset in your browser's DevTools. What you see is a single line of JavaScript stretching thousands of characters — the minified production build. DevTools has a built-in prettifier, but it doesn't always handle complex cases cleanly, and sometimes you need to paste the code somewhere you can annotate it or share it with a teammate. Paste the minified code here, select JavaScript, and you get properly indented, readable code you can actually reason about.

CSS beautification is particularly useful when inheriting a legacy codebase or working with generated stylesheets from design tools like Figma exports or older CSS preprocessors. Generated CSS often comes out either entirely flat or with inconsistent indentation that makes it hard to understand the selector hierarchy. Beautifying it before refactoring gives you a clean baseline to work from. HTML beautification is similarly valuable when dealing with email templates or CMS-generated markup — the kind of HTML that was clearly written by a tool rather than a human, with no regard for readability.

Frequently Asked Questions

Why doesn't my beautified code look right?

Beautifiers work best with syntactically correct code. If there are missing brackets, unclosed tags, or syntax errors, the output may be unexpected. Also ensure you've selected the correct code type (HTML, CSS, or JavaScript) for your input.

Should I use tabs or spaces for indentation?

This is largely personal preference, but consistency matters most. Many modern projects use 2 spaces for JavaScript/TypeScript and 4 spaces for Python/PHP. Teams should agree on a standard and enforce it with linters and formatters. Our beautifier uses spaces.

Can beautification break my code?

Pure formatting changes (whitespace and indentation) shouldn't affect functionality. However, improperly configured formatters might alter semantically significant whitespace in template strings or PRE elements. Always test beautified code before deploying.

What's the difference between beautifying and minifying?

Beautifying adds formatting for readability; minifying removes it for smaller file sizes. Use beautified code for development and debugging, minified code for production. They're opposite operationsminified code can be beautified to understand it, beautified code gets minified for deployment.

Should I commit beautified code to version control?

Yes! Source code should always be readable and properly formatted. Minification happens during the build process, not in source files. Use tools like Prettier with pre-commit hooks to ensure all committed code is consistently formatted.

What beautifier tools are commonly used?

Prettier is the most popular for JavaScript, HTML, CSS, and more. ESLint can also format JavaScript. PHP has PHP-CS-Fixer and PHP_CodeSniffer. Python uses Black and autopep8. Most IDEs have built-in formatters or support these tools via extensions.