CSS Beautifier - Format CSS Code Online

Format and beautify your CSS instantly with our free CSS Beautifier. This tool adds proper indentation, line breaks, and a space after each colon to minified or messy stylesheets so they are readable and easy to debug. Perfect for developers working with stylesheets, design systems, and component libraries. Simply paste your compressed CSS and get a neatly formatted version in seconds.

Beautifying (also called CSS formatting or pretty-printing) parses your stylesheet and re-emits it with consistent, nested indentation so the rule hierarchy is obvious at a glance — invaluable for spotting stray braces, understanding a stylesheet's structure, and reviewing someone else's code. It is the reverse of minification, so it makes a great companion to the CSS Minifier when you need to switch between readable source and compact output.

The formatter runs in real time and entirely in your browser — there is no signup and nothing is uploaded. Each rule opens on its own line, every declaration gets its own indented line, and closing braces line up with the selector that started them.

Live Example

Here is a single-line stylesheet before and after beautifying. The selectors and values are unchanged — only the indentation and line breaks are added:

.btn{display:inline-block;padding:10px 20px;background-color:#007bff;color:#ffffff}

.btn {
  display: inline-block;
  padding: 10px 20px;
  background-color: #007bff;
  color: #ffffff;
}

How to Use CSS Beautifier

1. Open the tool: Click Try It to launch the two-pane editor.
2. Paste Your CSS: Enter or paste your minified or unformatted CSS into the input area on the left.
3. Beautify Automatically: The tool adds nested indentation, line breaks, and a space after each colon while preserving your rules and values.
4. Review the Output: Read your clean, well-structured stylesheet in the formatted output panel.
5. Copy or Download: Copy the beautified CSS to your clipboard or download it as a .css file.

Key Features

• Nested indentation: every declaration is indented one level under its rule, and closing braces align with the selector.
• One declaration per line: each property-value pair gets its own line so the structure is scannable.
• Consistent colon spacing: a space is added after the : in each declaration for readability.
• Handles nested rules: at-rules like @media and nested selectors are indented at their correct depth.
• Copy or download: grab the beautified CSS to your clipboard or save it as a .css file.
• 100% private & client-side: everything runs in your browser — nothing is uploaded or stored.

Common Use Cases

• Code review: Reformat minified or machine-generated CSS so teammates can read and review it easily.
• Debugging: Indent rules to spot mismatched braces and stray properties quickly.
• Learning: Turn compressed CSS into readable stylesheets to understand how a page is styled.
• Stylesheet cleanup: Standardize indentation across CSS files before committing them to version control.
• Inheriting third-party CSS: Make sense of a library's minified stylesheet before customizing or overriding it.

About CSS Beautification

CSS beautification (or formatting / pretty-printing) rewrites a stylesheet with consistent indentation and line breaks so a human can read it. CSS is organized as a series of rules: each rule has a selector and a declaration block wrapped in braces, and the block contains property-value pairs. Indentation makes that nesting visible — properties sit one level deeper than their selector, and nested at-rules like @media push their contents a level deeper still. The browser does not need any of this whitespace to render correctly, which is exactly why production CSS is usually minified — but humans need it to understand, debug, and review the code.

A beautifier walks the stylesheet tracking brace depth. When it meets an opening brace it writes the selector followed by { and steps in a level; for every ; it flushes the current declaration onto its own indented line; and at a closing brace it steps out a level and writes } aligned with the selector. It also protects quoted strings, so values inside content: "", font names, and URLs keep their internal spaces and punctuation exactly as written.

Anatomy of a CSS Rule

A well-formatted rule places the selector and opening brace on one line, each declaration indented on its own line, and the closing brace on its own line at the selector's depth:

.card {
  background: #fff;
  border-radius: 8px;
  padding: 16px;
}

Beautify vs Minify

Beautifying and minifying are opposites. The CSS Minifier strips every dispensable character for the smallest file size, while the beautifier re-adds readable formatting for development and review. A healthy workflow keeps a readable source file under version control, minifies a copy for production, and beautifies third-party CSS when you need to inspect it. The same pattern applies to markup with the HTML Beautifier and to data with the JSON Beautifier.

Common CSS Formatting Issues & How to Fix Them

• Output still looks messy: malformed CSS — an unclosed brace or a missing semicolon — confuses the formatter. Fix the structural errors first, then beautify again.
• Indentation looks wrong after a missing brace: if a rule is never closed, every following rule is treated as one level too deep. Close all open braces and re-run the formatter.
• Colon spacing inside selectors: a beautifier adds a space after the colon in declarations (color: red) but leaves pseudo-class colons (a:hover) untouched because they sit on the selector line, not a declaration line.
• Comments removed: formatting here strips /* ... */ comments to keep the output clean. Keep a commented source copy if you need to preserve notes.
• Mixed tabs and spaces: the formatter normalizes all whitespace to two-space indentation, so inconsistent source files become uniform after beautifying.

Benefits of Using Our Tool

• ✅ Free to use with no registration required
• ✅ Instant, real-time formatting
• ✅ Preserves CSS rules and values while beautifying
• ✅ Clean, consistent indentation every time
• ✅ Private — all processing happens in your browser

Related Tools

Pair this formatter with its counterpart and the rest of our formatting and compression utilities:

• CSS Minifier — compress readable CSS into the smallest possible output.
• HTML Beautifier — pretty-print minified HTML for review and debugging.
• HTML Minifier — compress your markup for faster page loads.
• JSON Beautifier — format and validate JSON with proper indentation.
• HTML Tryit Editor — test your HTML, CSS, and JavaScript live in the browser.