CSS Minifier / Beautifier
Minify CSS to reduce file size or beautify compressed CSS for readability.
This tool is for informational and educational purposes only. It is not a substitute for professional financial, medical, legal, or engineering advice. See Terms of Service.
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Request a ToolHow to Use the CSS Minifier / Beautifier
This tool minifies or beautifies CSS code directly in your browser. No data is sent to any server. Here is how to use it:
- Paste your CSS. Copy your stylesheet code from a .css file, a style tag, or your code editor and paste it into the input box. The tool accepts any valid CSS including media queries, keyframes, and custom properties.
- Click Minify or Beautify. Minify removes all comments, unnecessary whitespace, and line breaks to produce the smallest possible output. Beautify adds proper indentation and line breaks to make compressed CSS human-readable again.
- Review the results. The result card shows the percentage of size reduction (for minification) or the line count (for beautification). The breakdown section shows original size, result size, bytes saved, and total lines.
- Copy the output. Click the Copy button to copy the processed CSS to your clipboard, ready to paste into your project.
Minification is useful for production deployments where you want to reduce CSS file size and improve page load speed. Beautification is useful when you need to read or edit minified CSS from a production site or third-party library.
About the CSS Minifier / Beautifier
CSS minification reduces file size by stripping comments, collapsing whitespace, removing trailing semicolons before closing braces, and eliminating unnecessary characters. This tool performs these optimizations using pure JavaScript in your browser. It handles standard CSS syntax including nested media queries, keyframe animations, and CSS custom properties. For most stylesheets, you can expect a 20-40% size reduction from minification alone. The beautifier reverses this process by adding consistent 2-space indentation and line breaks after opening braces, semicolons, and closing braces. Your CSS never leaves your browser, making this tool safe for proprietary or sensitive stylesheets.
Frequently Asked Questions
How much smaller will my CSS get after minification?
The reduction depends on how much whitespace and comments your CSS contains. Well-commented stylesheets with generous formatting typically see 20-40% reduction. Already compact CSS may see 5-15% reduction. The tool shows the exact percentage and byte savings after processing.
Does minification change how my CSS works?
No. Minification only removes characters that have no effect on how browsers interpret your CSS. Comments, extra whitespace, and trailing semicolons before closing braces are purely cosmetic. The minified CSS renders identically to the original in all browsers.
Is my CSS sent to a server?
No. All minification and beautification happens in your browser using JavaScript. Your CSS code is never transmitted to any server. This makes the tool safe for proprietary stylesheets and sensitive code.
Can this tool handle CSS with media queries and keyframes?
Yes. The tool processes standard CSS syntax including media queries, keyframe animations, CSS custom properties (variables), and nested at-rules. Both minification and beautification preserve the structure and meaning of these features.