About

CSS Minifier

Minify and compress CSS code to reduce file size

Input CSS0 bytes
Minified Output

Enter CSS and click Minify to compress

About This Tool

CSS Minifier is a free online tool that compresses your CSS code by removing unnecessary whitespace, comments, and optimizing syntax. Minifying CSS reduces file size, which leads to faster page load times and improved user experience. Smaller CSS files mean less data transferred over the network, resulting in quicker rendering and lower bandwidth costs, especially for high-traffic websites. Whether you're optimizing a single stylesheet or preparing CSS for production deployment, this tool helps you achieve smaller file sizes without changing any functionality. It is especially useful for web developers who want to improve Core Web Vitals scores, boost SEO rankings through faster load times, and enhance overall site performance. All processing happens directly in your browser — your CSS code is never sent to any server.

How to Use

  1. Paste your CSS code into the input area, or type it directly.
  2. Click the 'Minify' button to compress your CSS code.
  3. The minified output will appear in the output area automatically.
  4. Click 'Copy' to copy the minified CSS to your clipboard.
  5. Use 'Clear' to reset both input and output areas.

Frequently Asked Questions

No. CSS minification only removes whitespace, comments, and redundant characters without altering any rules or declarations. Your styles will render exactly the same after minification, so you can safely use the minified output in production.
Typical CSS files are reduced by 20-40% after minification, depending on the original formatting and comment density. Files with extensive comments, extra whitespace, and verbose formatting tend to see the greatest size reductions.
Yes. All processing happens entirely in your browser using client-side JavaScript. Your CSS code is never transmitted to any server, stored anywhere, or shared with third parties. Your code remains completely private.
Currently, this tool processes one CSS block at a time. However, you can concatenate multiple CSS files into a single block and minify them together. This is actually a common best practice for reducing HTTP requests in production.
Advertisement