CSS Minifier
Minify CSS by removing whitespace, comments, and applying safe optimizations — reducing file size without changing behavior.
Runs entirely in your browser — your files are never uploaded to a server.
How It Works
1. Choose Your File
Drag & drop or select the file you want to work with.
2. Processed in Your Browser
Everything happens locally on your device — your file is never uploaded anywhere.
3. Download Your Result
Get your finished file instantly, ready to save or share.
Frequently Asked Questions
Will minifying change how my CSS behaves?
No — only safe transformations are applied (removing whitespace/comments, shortening values like colors), never anything that changes the visual result.
How much smaller will my CSS get?
It depends on your original formatting and how much whitespace/comments it contains — typically 20-60% smaller for normally-formatted stylesheets.
What happens if my CSS has a syntax error?
You'll see an error message rather than a broken or silently incorrect result.