★ Free Developer Tool
CSS Minifier
Minify CSS by removing comments and extra whitespace to speed up pages.
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Runs entirely in your browser. Your files and text are never uploaded to our server.
About this toolCSS Minifier shrinks stylesheets by stripping comments, spaces and line breaks, so pages download faster.
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CSS Minifier shrinks stylesheets by stripping comments, spaces and line breaks, so pages download faster.
More about CSS MinifierHow to use, good to know & FAQ
How to use CSS Minifier
- Paste your CSS.
- Click "Minify" and see the size saved.
- Copy or download the minified CSS.
Frequently asked questions
Will it break my CSS?
It only removes characters browsers ignore. Keep your original file for editing.
Does minifying change how CSS works?
No. Only unnecessary characters are removed; styles stay the same.
How much smaller will my CSS be?
Typically 20–40% smaller, depending on comments and formatting.
When to use CSS Minifier
- Reduce stylesheet size for faster pages
- Prepare CSS for production
- Clean up exported CSS
- Improve PageSpeed scores
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