CSS-Minifier

About This Tool

Look, if you’ve ever worked with CSS, you know how quickly it can get bloated. You start with clean, readable code—comments, spacing, the whole nine yards. Then you push to production and realize your 20KB stylesheet is now 50KB because someone added three different ways to center a div “just in case.” That’s where a CSS minifier comes in. It’s not magic, but it’s close. You paste in your CSS, hit a button, and out comes a stripped-down, optimized version. No extra spaces. No redundant rules. No comments. Just the bare essentials your browser actually needs. I’ve used a dozen of these tools over the years. Some are clunky. Some break your code. This one? It just works. It’s fast, reliable, and doesn’t try to be something it’s not. No ads, no signups, no “premium features” locked behind a paywall. Just minification. Honestly, that’s all I want.

Key Features

• Removes all unnecessary whitespace, line breaks, and indentation—because your browser doesn’t care about your formatting preferences.
• Strips out comments. Yeah, even the ones you wrote to explain that weird flexbox hack.
• Combines duplicate selectors and merges overlapping rules where possible. Saves bytes without breaking layout.
• Shortens color values—turns #ffffff into #fff, because why type more than you have to?
• Preserves essential CSS structure. No mangling your animations or breaking your media queries.
• Works entirely in your browser. Your code never leaves your machine. Privacy? Check.
• Instant results. Paste, click, copy. Done.

FAQ

Will this break my CSS?
Not if your CSS was valid to begin with. The minifier follows standard rules and avoids aggressive optimizations that could cause issues. That said, always test the output—especially if you're using complex selectors or experimental features. Better safe than sorry.

Can I undo the minification?
Nope. Once it’s minified, it’s minified. That’s why you should always keep a backup of your original file. Think of the minified version as the “production copy”—something you deploy, not something you edit.