CSS Formatter/Minifier
Paste your stylesheet below and this CSS formatter either cleans it up for readability or strips it down for production, whichever you need right now.
About
About CSS Formatter/Minifier
A css formatter takes a stylesheet with inconsistent spacing, often the result of several developers touching the same file, and reorganizes it with standard indentation and line breaks. The minifier side of this css formatter minifier does the opposite on purpose, stripping out every bit of whitespace, comments, and unnecessary characters to produce the smallest possible file for production.
Minification goes beyond just removing spaces. A thorough minifier also drops the units off zero values, since 0px and 0 render identically, removes the final semicolon in a rule block since it's not required before the closing brace, and can merge selectors that share identical rule sets. None of this changes specificity or how the browser applies the styles.
On the readability side, consistent formatting matters more on a shared codebase than people usually credit. A formatter standardizing every contributor's CSS to the same indentation and property ordering makes it genuinely faster to scan a stylesheet for the one rule that's causing a layout bug.
Paste your CSS and choose format to clean it up for debugging, or minify to compress it before deployment. The minified output strips comments and collapses whitespace while leaving your actual selectors, properties, and values completely untouched.
Processing happens locally in your browser, so your styling architecture, including anything proprietary about how a client's design system is built, never gets sent to an external server just to be reformatted or compressed.
FAQ
Frequently asked questions
Why bother minifying CSS before deploying a site?
Minifying strips characters the browser doesn't need to render your styles, spaces, comments, unnecessary line breaks, which shrinks the file size and lets the browser download and apply your styles faster.
Does minifying CSS ever change how a page looks?
No, a minifier only removes characters that have no visual effect, whitespace and comments mainly. Your selectors, property values, and specificity stay exactly as written, so the rendered page looks identical.
How do I make changes to a file that's already been minified?
Paste the minified CSS back into this tool and run it through format instead. That restores readable line breaks and indentation so you can actually locate and edit the rule you need.
Does this tool catch CSS syntax errors?
Not really, it's built for restructuring and compression rather than validation. A severely broken rule might produce odd spacing in the output, but a dedicated CSS linter is the right tool for catching actual syntax mistakes.
Is my stylesheet uploaded anywhere when I use this?
No, both formatting and minifying happen locally in your browser using JavaScript. Nothing you paste gets logged or stored.
What's the difference between minification and server-side compression?
Minification permanently removes characters from the file itself before it's saved. GZIP or Brotli compression happens at the server level when the file is actually sent over the network. For the best load time, you typically want both working together.
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