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CSS Minifier

Minify and compress CSS to shrink file size.

PDF & Document ToolsBrowser-only • PrivateFree

CSS Input

Minified CSS

Output will appear here...

Privacy First: All processing happens locally in your browser. Your data never leaves your device and is never uploaded to any server.

About CSS Minifier

The CSS Minifier compresses your stylesheet by stripping comments, whitespace, and unnecessary characters, producing the smallest valid CSS for production. Smaller CSS downloads faster and improves page speed and Core Web Vitals. Minification runs locally in your browser with nothing uploaded. To make the CSS readable again, use the CSS Formatter, and minify your scripts with the JavaScript Minifier.

How to Use

1Open CSS Minifier and paste or type your data into the input area.
2Adjust any available options to match the result you want.
3Your output is generated instantly — no button-clicking required for most tools.
4Use the Copy or Download button to save your result.

Common Use Cases

Previewing markdown and HTML before publishing
Formatting and minifying CSS, JavaScript, and HTML
Converting between markdown and HTML for docs and CMSs
Cleaning up code snippets for readability

Frequently Asked Questions

How much smaller will my CSS get?

Savings depend on formatting and comments, but minified CSS commonly shrinks by 20-50%, which reduces download size and helps pages render faster.

Does minifying break my styles?

No. Minification only removes characters that don't affect meaning — comments and whitespace — so the rendered result is identical while the file is smaller.

Is CSS Minifier free to use?

Yes. CSS Minifier is completely free with no sign-up, no subscription, and no usage limits. Every tool on CodeUtilityKit is free forever.

Is my data safe when I use CSS Minifier?

Absolutely. CSS Minifier runs entirely in your browser. Your input is processed locally with JavaScript and is never sent to, stored on, or logged by any server — so it is safe even for private or sensitive data.