CSS Minifier
Minify CSS by removing comments, unnecessary whitespace, newlines and the last semicolon in each block, producing the smallest stylesheet that still behaves identically. Smaller CSS means fewer bytes over the network and faster rendering, which matters for page speed and Core Web Vitals. This tool collapses runs of whitespace, drops spaces around braces, colons and semicolons, and strips comment blocks, while being careful not to break values that legitimately contain spaces. It reports the byte savings so the win is visible. Paste your CSS, click minify, and copy the compact result into your build or paste it inline. Everything is processed locally in your browser, so proprietary design tokens and internal styles are never uploaded to any server.
How to use CSS Minifier
- Paste your CSS.
- Click minify to strip comments and whitespace.
- Check the bytes saved and copy the result.
Frequently asked questions
What does the CSS minifier strip?
It removes comments, whitespace and newlines so the stylesheet is as small as possible while keeping every rule intact.
Does minifying change how styles render?
No. The selectors, properties and values are preserved, so the page looks identical with a smaller file.
Does it show how much I saved?
Yes. It reports the byte savings so you can see how much smaller the minified output is.
What is CSS Minifier?
Minify CSS by removing comments, unnecessary whitespace, newlines and the last semicolon in each block, producing the smallest stylesheet that still behaves identically. Smaller CSS means fewer bytes over the network and faster rendering, which matters for page speed and Core Web Vitals.
Is CSS Minifier free to use?
Yes. CSS Minifier is completely free, with no sign-up and no usage limits.
Does CSS Minifier work in a web browser?
Yes. CSS Minifier runs in any modern web browser. There is nothing to download or install.
Is my data private with CSS Minifier?
Yes. CSS Minifier runs entirely on your device in your browser, so nothing you enter is uploaded to a server.
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