CSS Minifier

Shrink CSS for production with comment stripping, color compression and optional selector merging.

100% Browser-Based — CSS never uploads to our servers. All processing runs locally in your browser.

Paste CSS

Tip: drag & drop a .css file onto this card, or use Upload below.

Upload CSS

Tool Options

Remove comments Remove empty rules Merge selectors Compress colors Remove last semicolon Minify variables Live minify

Results

Results will appear here…

How It Works

Fast CSS utilities that run entirely in your browser.

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Paste or design

Paste CSS, upload a .css file, or use the visual controls. Nothing is uploaded to our servers.

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Process in browser

All parsing and generation runs locally in your browser — 100% client-side.

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Copy or download

Export CSS, TXT, JSON, HTML examples, and more instantly.

Zero server upload — your CSS stays on your device.

About CSS Minifier

Minify CSS by removing comments, empty rules and whitespace. Compress colors and optional units — free browser tool with size saved stats. Built for frontend developers with live preview, copy and multi-format export.

FAQs

Is my CSS uploaded?

No. All CSS tools process your content in the browser. FreeConverter servers never receive your CSS.

Is this free?

Yes. FreeConverter.app online CSS tools are free to use.

Do I need an account?

No account or installation is required.