Developer Tools

Code Beautifier & Formatter

Prettify and format HTML, CSS, or JavaScript with proper indentation and structure.

Runs in your browser

Input
Formatted Output
Input

Output

Lines

Next useful step

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What is the Code Beautifier?

A code beautifier (or code formatter) automatically reformats source code with correct indentation, consistent spacing, and readable line breaks without altering the code's logic or behaviour. It is used by developers reviewing unfamiliar codebases, fixing auto-generated code, or enforcing a consistent style before committing to version control. Paste HTML, CSS, or JavaScript and choose your indentation preference. The beautifier applies language-specific formatting rules: nested HTML tags are indented correctly, CSS declarations are one per line, and JavaScript blocks are properly spaced with consistent brace placement.

How to use the Code Beautifier

Select your language using the HTML / CSS / JS tabs at the top, then paste your code into the Input panel. Choose your preferred indentation size from the dropdown and click Beautify Code. The formatted output appears immediately in the right panel. The tool processes your code live as you type for instant feedback. Use the line and size statistics in the bar below the editor to monitor output length. Click Copy to copy the formatted code to your clipboard, then paste it back into your editor or version control system.

Frequently asked questions

This tool supports HTML, CSS, and JavaScript (including ES6+ syntax). Select the language from the tabs before beautifying for the best results.
Beautified code is easier to read, debug, and maintain. It is especially useful when working with minified or machine-generated code, or when collaborating with a team that needs consistent formatting.
No formatting only affects whitespace and indentation. The logic and output of the code remains identical regardless of formatting.
Select JavaScript mode and paste TypeScript code the formatter handles most TypeScript syntax correctly since TS is a superset of JS. Type annotations and generics are generally preserved, though complex generic expressions may occasionally need manual adjustment.
Beautify adds whitespace and indentation for human readability. Minify removes all unnecessary whitespace to produce the smallest possible file. Use beautify during development and minify for production deployments.