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Browser-based CSS utility

CSS Minifier — Free Online CSS Compression Tool

Minify and beautify CSS instantly in your browser. Remove comments, whitespace, and unnecessary characters without uploading your styles anywhere.

Input CSS

Paste raw CSS here

1

Processed Output

Ready for processing

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Processed CSS will appear here.
Original size 0 B
Minified size 0 B
Savings Saved 0%

What Is CSS Minification?

CSS minification removes comments, extra spaces, line breaks, and other non-essential characters from your stylesheet so the file becomes smaller without changing how it works. The result is leaner CSS that loads faster and sends fewer bytes to the browser.

How Much Can CSS Minification Save?

Typical CSS files often shrink by 20% to 80% depending on how much whitespace, commenting, and repeated formatting they contain. Large utility stylesheets and hand-written theme files usually benefit the most because there is more non-essential formatting to remove.

CSS Minification vs Gzip Compression

Minification reduces the CSS source itself before it is served. Gzip or Brotli compression happens during delivery over the network. In production, you should usually use both: minify the file first, then let the server compress the response for even better results.

How to Use This CSS Minifier

  1. 1. Paste your CSS into the input panel or load the sample stylesheet.
  2. 2. Click Minify CSS to compress it or Beautify CSS to make it readable.
  3. 3. Copy the output and use it in your project or deployment workflow.

FAQ

Does minification break my CSS?

Proper minification should not change the meaning of valid CSS. It only removes formatting and other non-essential characters.

Should I minify CSS in development?

Usually no. Beautified CSS is easier to debug in development, while minified CSS is best for production builds.

What's the difference between minify and compress?

Minify changes the source code to remove extra characters. Compression like Gzip or Brotli reduces transfer size when the file is sent over the network.

Is this tool safe for production CSS?

Yes, for normal valid CSS. This tool runs in your browser and is safe to use for checking production styles before deployment.