CSS Minifier & Beautifier

Minify or beautify CSS. Remove comments, collapse whitespace, shorten values. Shows compression percentage saved.

Free Always No Account Needed 100% Client-Side

Input CSS (263 bytes)

Output (307 bytes)

.container {
  display:flex;
  flex-direction:column;
  align-items:center;
  padding:20px;
  background-color:#f0fdf4;
  border-radius:8px;
  box-shadow:0 2px 4px rgba(0,0,0,0.1)
}
.container h1 {
  font-size:2rem;
  color:#15803d;
  margin-bottom:16px
}
.container p {
  color:#374151;
  line-height:1.6
}

About this tool

CSS performance matters — every kilobyte of CSS blocks rendering. Minification removes unnecessary characters without changing the visual output.

CSS Minifier removes: - Comments - Redundant whitespace and newlines - Optional semicolons and braces - Unnecessary units (0px → 0) - Shorthand expansion (margin: 0 0 0 0 → margin: 0)

CSS Beautifier reformats compressed or minified CSS with proper indentation, newlines after each declaration, and consistent spacing. Turn a single-line production CSS file back into readable source.

Shows the original and compressed sizes with a savings percentage. Supports standard CSS, including custom properties (CSS variables), media queries, @keyframes, @supports, and modern selectors.

Frequently Asked Questions

Is CSS minification lossless?

Yes. Minification only removes characters that are syntactically optional — the browser renders identically minified or not.

How much does CSS minification save?

Typically 20-40% for hand-written CSS. Well-written CSS with few comments saves less; CSS with lots of whitespace and comments saves more.

Does it support CSS variables?

Yes. Custom properties (--color: #fff) are preserved correctly. Values inside var() are not modified.

What about vendor prefixes?

Vendor prefixes (-webkit-, -moz-, etc.) are preserved as-is. Use a tool like Autoprefixer to add or remove them.

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