CSS Minifier — Shrink Stylesheets Instantly [2026]
Paste CSS → get minified output with size-reduction stats. Strips comments, whitespace, and redundant semicolons. Typical savings 15-40%. Fast, private, browser-based.
What is CSS Minifier?
How to Use CSS Minifier
Paste your CSS code into the input area on the left. Click the Minify button or the tool will process automatically. The minified CSS appears on the right along with statistics showing the original size, minified size, and percentage reduction. Copy the minified CSS and use it in your production build.
How CSS Minifier Works
Common Use Cases
- Reducing CSS file size for faster page load times
- Optimizing CSS before deploying to production
- Checking how much space CSS minification saves
- Quick one-off minification without build tool setup
- Compressing inline CSS for email templates
Frequently Asked Questions
Does minification change how my CSS looks in the browser?▼
No. Minified CSS renders exactly the same as the original. Only whitespace, comments, and unnecessary characters are removed. All selectors, properties, and values remain unchanged.
How much size reduction can I expect?▼
Typical CSS minification reduces file size by 15-40%, depending on how much whitespace and comments are in the original code. Heavily commented stylesheets see the largest reductions.
Should I use this instead of a build tool like PostCSS?▼
For production projects, use a build tool like PostCSS, cssnano, or the built-in minification in webpack/Vite. This online tool is ideal for quick one-off minification, testing, or projects without a build pipeline.
Is my CSS data sent to a server?▼
No. All minification happens entirely in your browser. Your CSS code never leaves your machine.