CSS Minifier

Minify CSS code to reduce file size. Remove comments, whitespace, and optimize.

Input CSS2.13 KB

/* ===================
   Main Stylesheet
   Updated: March 2026
   =================== */

/* Reset and base styles */
* {
  margin: 0;
  padding: 0;
  box-sizing: border-box;
}

body {
  font-family: 'Inter', -apple-system, BlinkMacSystemFont, sans-serif;
  font-size: 16px;
  line-height: 1.6;
  color: #333333;
  background-color: #ffffff;
}

/* Navigation */
.navbar {
  display: flex;
  align-items: center;
  justify-content: space-between;
  padding: 1rem 2rem;
  background-color: #1a1a2e;
  box-shadow: 0 2px 10px rgba(0, 0, 0, 0.1);
}

.navbar a {
  color: #e0e0e0;
  text-decoration: none;
  font-weight: 500;
  transition: color 0.3s ease;
}

.navbar a:hover {
  color: #ffffff;
}

/* Hero Section */
.hero {
  display: flex;
  flex-direction: column;
  align-items: center;
  padding: 4rem 2rem;
  text-align: center;
  background: linear-gradient(135deg, #667eea 0%, #764ba2 100%);
}

.hero h1 {
  font-size: 3rem;
  font-weight: 800;
  color: #ffffff;
  margin-bottom: 1rem;
}

.hero p {
  font-size: 1.25rem;
  color: rgba(255, 255, 255, 0.9);
  max-width: 600px;
}

/* Buttons */
.btn {
  display: inline-flex;
  align-items: center;
  padding: 0.75rem 1.5rem;
  border: none;
  border-radius: 0.5rem;
  font-size: 1rem;
  font-weight: 600;
  cursor: pointer;
  transition: all 0.2s ease;
}

.btn-primary {
  background-color: #4f46e5;
  color: #ffffff;
}

.btn-primary:hover {
  background-color: #4338ca;
}

/* Card Grid */
.card-grid {
  display: grid;
  grid-template-columns: repeat(auto-fill, minmax(300px, 1fr));
  gap: 1.5rem;
  padding: 2rem;
}

.card {
  background: #ffffff;
  border-radius: 1rem;
  padding: 1.5rem;
  border: 1px solid #e5e7eb;
  transition: transform 0.2s ease, box-shadow 0.2s ease;
}

.card:hover {
  transform: translateY(-4px);
  box-shadow: 0 12px 24px rgba(0, 0, 0, 0.1);
}

/* Footer */
.footer {
  padding: 2rem;
  background-color: #1a1a2e;
  color: #9ca3af;
  text-align: center;
  font-size: 0.875rem;
}

/* Responsive */
@media (max-width: 768px) {
  .hero h1 {
    font-size: 2rem;
  }

.card-grid {
    grid-template-columns: 1fr;
    padding: 1rem;
  }

.navbar {
    flex-direction: column;
    gap: 1rem;
  }
}

Minified Output

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Frequently Asked Questions

What does CSS minification do?

CSS minification removes unnecessary characters like whitespace, newlines, and comments without changing functionality. This reduces file size and improves page load speed.

How much can CSS be compressed?

Typical CSS files can be reduced by 20-50% through minification. Files with many comments and generous formatting see the largest reductions.

Will minifying CSS break my styles?

No. CSS minification only removes whitespace, comments, and redundant syntax. The browser interprets the minified output identically to the original source, so your styles will render exactly the same.

Should I minify CSS for production?

Absolutely. Minified CSS loads faster, reduces bandwidth costs, and improves Core Web Vitals scores. Every major website serves minified stylesheets in production for optimal performance.

What is the difference between CSS minification and compression?

Minification removes unnecessary characters at the code level, while compression (like Gzip or Brotli) encodes the file at the transfer level. For best results, use both: minify your CSS first, then serve it with server-side compression enabled.

Can I reverse CSS minification?

You cannot perfectly restore comments or original formatting, but you can use a CSS beautifier or formatter to add back indentation and line breaks. This is why you should always keep your original source files during development.

Does this tool work with Sass or LESS output?

Yes. This tool minifies any valid CSS, regardless of whether it was hand-written or compiled from a preprocessor like Sass, LESS, or Stylus. Paste the compiled CSS output and it will be minified.

Is my CSS data safe when using this tool?

Completely. All minification happens directly in your browser using client-side JavaScript. Your CSS code is never uploaded to any server, ensuring full privacy and security.

How to Use the CSS Minifier

Our free CSS Minifier makes it easy to compress your stylesheets in seconds. Simply paste your CSS code into the input panel on the left, and the minified output appears instantly on the right. You can copy the result to your clipboard with a single click or compare file sizes to see exactly how much space you saved. There is nothing to install, no account required, and all processing happens locally in your browser for complete privacy.

The tool handles everything from small component styles to large framework stylesheets. Whether you are working with hand-written CSS, output from Sass or LESS, or Tailwind utility classes, the minifier strips every unnecessary byte while preserving the exact same rendering in all browsers.

What Is CSS Minification?

CSS minification is the process of removing all non-essential characters from Cascading Style Sheets without altering how the browser interprets them. This includes whitespace, line breaks, block comments, and redundant semicolons. The result is a single compact string that is functionally identical to the original but significantly smaller in file size.

Modern web performance best practices recommend minification as a baseline optimization. Google PageSpeed Insights, Lighthouse, and other auditing tools flag unminified CSS as a performance issue. Reducing stylesheet size directly improves First Contentful Paint (FCP) and Largest Contentful Paint (LCP), two Core Web Vitals metrics that influence search rankings.

CSS Minifier Use Cases

Developers and designers rely on CSS minification across a wide range of workflows. Front-end engineers minify stylesheets before deploying to production servers, ensuring users download the smallest possible files. WordPress and CMS administrators paste theme CSS into the minifier to improve page speed without modifying the original theme files. Email developers compress inline styles to stay within email client size limits, and open-source maintainers provide minified distribution files alongside readable source code.

Agencies and freelancers also use CSS minification as part of client deliverables. Delivering optimized assets demonstrates professionalism and directly impacts the client site performance scores. For landing pages where every millisecond counts, minified CSS can be the difference between a good and great Lighthouse score.

Why Use Our CSS Minifier?

Unlike build-tool plugins that require configuration and a local development environment, our online CSS Minifier is instant and accessible from any device. It runs entirely in the browser, meaning your code is never transmitted over the network. This makes it ideal for quick one-off tasks, for developers working on machines without Node.js installed, and for anyone who values privacy. The tool also displays a before-and-after size comparison so you can quantify the savings and report them to stakeholders. Fast, free, and private, it is the simplest way to optimize your CSS for production.