Minify CSS to reduce file size online — Free Online Tool

What Is a CSS Minifier?

A CSS Minifier is an online utility that minify css instantly online — removes comments, whitespace, and redundant rules to reduce your stylesheet size by up to 70%.. It eliminates the need to write scripts or install local tools for this common development task.

DevKits provides a free, browser-based css minifier online free. All processing happens client-side — your data never leaves your machine.

How to Use It

1. Paste your CSS. Click Minify. Copy or download the compressed output.

Key Features

• Comment removal, whitespace stripping, shorthand property merging, comparison showing bytes saved
• 100% browser-based — no server, complete privacy
• Free forever — no signup

Common Use Cases

Optimizing stylesheets for production, reducing page load time, compressing third-party CSS

FAQ

Is it free?

Yes — unlimited use, no signup, no rate limits.

Is my data safe?

All processing is local to your browser. Nothing is sent to any server.

Which browsers work?

Chrome, Firefox, Safari, Edge — desktop and mobile.

Can I rely on this for production use?

Great for dev and debugging. For production, use standard libraries with the same algorithm.

Any file size limits?

No hard limits — bounded only by your browser's memory.