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Tools / Developer / CSS Minifier

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CSS Minifier

Minify CSS instantly by removing whitespace and unnecessary characters.

Step 1

Paste input

Add your content in the input editor.

Step 2

Run tool

Process instantly with in-browser logic.

Step 3

Copy output

Export clean results to your project.

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⚡ Runs instantly in your browser. No files are uploaded.

Input

Output

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Learn more about this topic:

How to Minify CSS (Reduce File Size)

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About CSS Minifier

Every unnecessary byte of CSS a browser downloads before painting the first pixel delays First Contentful Paint. Minification removes whitespace, comments, and redundant characters from stylesheets without changing any rule, selector, or property value. This CSS minifier processe...

Minify a stylesheet for a static HTML site that does not pass through a build tool. Compress a third-party CSS component you are inlining to avoid a separate network request. Reduce a legacy project's CSS files before a performance review or audit. Prepare email HTML inline CSS to stay under size limits that affect deliverability.

Related guides and workflows

📦 Supported formats 1 file types

CSS

Frequently asked questions 3 answers

Typically 20–50% smaller depending on how much whitespace and how many comments the original contains.

No. The minifier only removes insignificant whitespace and comments. Selectors and rules are preserved.

Build tools like Vite or webpack handle minification automatically. Use this tool for quick one-off jobs or files you can't run through a build pipeline.