CSS Minifier
Minify CSS by removing whitespace, comments, and unnecessary characters to reduce file size and improve load speed.
About CSS Minifier
CSS files grow quickly as a project matures, and unminified stylesheets are full of whitespace, comments, and verbose color formats that the browser does not need. This CSS minifier takes any stylesheet and produces a compressed version, typically reducing file size by 20 to 40 percent without changing how the rules render. The result is faster page loads, smaller bandwidth costs, and quicker time to interactive on slow connections.
Day to day, this is useful for shipping a single hand-written stylesheet to production without setting up a full build toolchain, optimizing CSS for performance-critical email templates, and quickly checking how much room your stylesheet has to grow. Browser-only processing means the tool works offline and never sends your styles to a third-party server.
How to Use
Paste your CSS code into the input box.
Choose your minification options (remove comments, trailing semicolons, etc.).
Click 'Minify' to process your CSS.
Copy the minified result. The tool shows how much size was saved.
Frequently Asked Questions
What does CSS minification do?
CSS minification removes unnecessary characters like whitespace, comments, and trailing semicolons without changing how the CSS works. This reduces file size and improves page load speed.
Will minification break my CSS?
No. The minifier only removes characters that don't affect how browsers interpret your styles. Your CSS will work exactly the same after minification.
How much size can I save?
Typical savings are 20-40% depending on how much whitespace and comments your CSS contains. Well-commented, nicely formatted CSS will see the largest reductions.
Is my CSS sent to any server?
No. All processing happens entirely in your browser. Your code never leaves your device.
CSS Minifier Online: Minify CSS to Speed Up Your Website (Free)
Every kilobyte of CSS counts for page speed. Minifying CSS shaves 30-40% off file size with no functional changes — and improves your Core Web Vitals.
Read the full guide