CSS Minifier

Every kilobyte matters for web performance. CSS minification removes unnecessary characters from your stylesheets — whitespace, line breaks, comments, and redundant semicolons — without changing how the browser interprets the code.

A typical CSS file shrinks by 30-60% after minification. For sites loading multiple stylesheets, the cumulative savings translate directly into faster page loads, better Core Web Vitals scores, and improved SEO rankings.

Our CSS Minifier runs entirely in your browser. Paste your CSS, click minify, and copy the compressed output. No server uploads, no file size limits, no registration required.

/* Before minification */
.header {
    background-color: #ffffff;
    padding: 20px 20px 20px 20px;
    margin: 0px;
}

/* After minification */
.header{background-color:#fff;padding:20px;margin:0}

• Production deployment — Minify stylesheets as part of your build pipeline before going live.
• Performance optimization — Reduce CSS file sizes to improve Core Web Vitals and page speed scores.
• Email templates — Inline and compress CSS for HTML emails where every byte counts.
• Quick fixes — Minify a single file without setting up a full build tool like Webpack or Gulp.