CSS Minifier
Minify CSS instantly by removing comments and unnecessary whitespace. Generate compact stylesheet code, compare file size and copy or download the result.
Minify Your CSS
Convert formatted CSS into compact production-ready CSS
CSS Input
Paste, type, upload or drop CSS
Minified CSS Output
Compact stylesheet result
Waiting
Ready to Minify
Enter CSS and click Minify CSS.
Original
0 B
Minified
0 B
Saved
0 B
Reduction
0%
Browser-Based CSS Minification
This implementation processes JSON directly in your browser with JavaScript. Minification, formatting, copying and file-size calculations do not require the JSON text to be sent to a server.
CSS Minifier Features
Compact CSS in Seconds
Reduce unnecessary CSS formatting while preserving stylesheet rules.
Instant Minification
Convert formatted CSS into compact stylesheet code.
Size Comparison
Compare original and minified CSS sizes instantly.
Comment Removal
Remove standard CSS comments while preserving string content.
Copy & Download
Copy minified output or save it as a CSS file.
Three Simple Steps
How to Minify CSS Online
Enter CSS
Paste CSS into the editor, upload a file or drag and drop a stylesheet.
Minify CSS
Click Minify CSS to validate the input and remove unnecessary formatting.
Copy or Download
Review the compact output, copy it to the clipboard or download a CSS file.
CSS Minification Guide
What Is a CSS Minifier?
A CSS Minifier reduces stylesheet size by removing comments, unnecessary whitespace and redundant spacing around punctuation. The goal is to create a smaller representation of the same stylesheet for faster transfer and production deployment.
This tool processes CSS directly in your browser. It preserves quoted strings, protects custom property values conservatively and generates compact output that you can copy or download.
CSS Minification Example
Formatted CSS:
/* Button style */
.button {
color: white;
background: #2563eb;
padding: 12px 20px;
}Minified CSS:
.button{color:white;background:#2563eb;padding:12px 20px}Why Minify CSS?
Smaller CSS files require fewer bytes to transfer. Minification can complement HTTP compression, caching and bundling in a production web performance workflow.
Readable source CSS is usually better during development, while minified output is commonly used for deployment. Keep an original source file or source map when maintainability matters.
Does CSS Minification Change Styling?
A correct minifier should preserve stylesheet behavior while removing syntax that is not required for interpretation. CSS can contain edge cases involving strings, comments, custom properties and modern syntax, so production build tools may apply deeper parser-based optimization.
This browser tool uses a conservative minification approach designed for common CSS workflows and avoids aggressive transformations that could alter values.
CSS Minifier vs CSS Formatter
A CSS Minifier removes unnecessary formatting to reduce file size. A CSS Formatter adds indentation and line breaks to improve readability. The two tools serve opposite purposes in development and deployment workflows.
Common Uses for Minified CSS
Production Assets
Reduce stylesheet bytes before deployment.
Static Websites
Create compact CSS files for lightweight pages.
Build Testing
Compare source and compact stylesheet sizes.
Code Sharing
Generate compact snippets for embedding or transfer.
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CSS Minifier FAQs
Minify Your CSS Now
Paste CSS, remove unnecessary formatting and generate compact stylesheet code in seconds.
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