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CSS formatter & minifier

Beautify CSS with proper indentation or minify it for production. Strips comments, normalizes whitespace. Instant results in your browser.

Indent
format
css
.container {
  display:flex;
  gap:16px;
  padding:24px;
  background-color:#1a1a2e;
  border-radius:12px
}
.title {
  font-size:24px;
  font-weight:bold;
  color:#f0f4ff
}

What is CSS Formatter & Minifier?

A CSS formatter is a developer tool that restructures cascading style sheet code into clean, readable format with consistent indentation, one property per line, and properly nested selectors. When CSS is written inline, generated by preprocessors, or extracted from minified production files, it becomes a dense block that is difficult to read and maintain. This tool parses your CSS and rebuilds it with your choice of 2-space or 4-space indentation, placing each declaration on its own line and properly indenting nested rules like media queries and keyframe animations. In minify mode, it does the reverse — stripping all comments, collapsing whitespace, removing spaces around selectors and properties, and eliminating trailing semicolons before closing braces. The minified output is the smallest valid CSS representation of your stylesheet, reducing bandwidth and improving page load performance. A size comparison shows exactly how many characters and what percentage was saved. All processing runs in your browser with zero server upload, making it safe for proprietary design systems and client stylesheets.

How to Use CSS Formatter & Minifier

  1. 1

    Select format or minify mode

    Choose Format to beautify your CSS with clean indentation, or Minify to compress it for production. In format mode, select 2 or 4 space indentation to match your project conventions.

  2. 2

    Paste your CSS

    Paste your stylesheet code from your editor, browser DevTools, or build output into the input area. The tool handles selectors, declarations, media queries, and nested rules.

  3. 3

    Copy the output

    Click Copy to place the result on your clipboard. In minify mode, check the savings indicator to see how much smaller your CSS became. Use formatted CSS for development and minified for deployment.

Features

  • Beautify CSS with consistent 2-space or 4-space indentation
  • Minify by stripping comments and all unnecessary whitespace
  • Removes trailing semicolons before closing braces in minify mode
  • Real-time size comparison with percentage savings display
  • Handles media queries, keyframes, and nested CSS rules
  • Zero server upload — all processing in your browser

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Frequently Asked Questions

Does the formatter handle Sass or SCSS?+
This tool is designed for standard CSS. Sass/SCSS syntax with nesting, variables, and mixins may not format correctly. Compile your Sass to CSS first, then use this tool to format or minify the output.
Are CSS comments preserved in format mode?+
Comments are removed in both modes to produce clean output. If you need to preserve comments, keep your original source file and only use the formatted output for reference or the minified output for production.
How much can CSS minification save?+
Savings typically range from 15-40% depending on how verbose your original CSS is. Stylesheets with many comments, generous spacing, and long-hand properties see the largest reductions.
Does minification affect CSS specificity or behavior?+
No. Minification only removes whitespace, comments, and unnecessary semicolons. All selectors, properties, and values remain identical, so your styles render exactly the same.
Can I format CSS from browser DevTools?+
Yes. Copy the CSS from the Styles panel or a stylesheet in DevTools Sources tab, paste it here, and the tool will format it with clean indentation for easier reading and editing.
Is there a file size limit?+
There is no artificial limit. The tool processes CSS in your browser memory, handling stylesheets of several hundred kilobytes easily. Very large CSS files (1MB+) may take a moment depending on your device.