What is CSS Minifier?
Free online CSS minifier. Compress CSS by removing whitespace, newlines, and comments. Advanced options include color shorthand merging and unused prefix removal — zero style impact. Suitable for production deployment.
▶Use Cases4 scenarios
- ◆Production deployment
- ◆Performance optimization
- ◆CSS cleanup
- ◆Load speed improvement
▶How to Use4 steps
- 1Paste CSS code
- 2Click Minify
- 3See minified result
- 4One-click copy
▶Features4 features
- ✓Deep compression
- ✓Styles preserved
- ✓Live preview
- ✓Free
▶FAQ7 questions
What is CSS Minifier?
An online CSS minifier. Remove whitespace and comments for smaller files. Supports multiple input formats with one-click copy or download. All operations run locally in your browser — no uploads.
Does minifying change the styles?
No — only whitespace and comments are removed; styles remain exactly the same.
What compression ratio can I expect?
Typically 30-50% file size reduction.
How much can CSS be minified?
Typically 30-50% file size reduction. Advanced minification can achieve more.
Will minification break styles?
No. Only whitespace, comments, and syntax optimization. Visual output remains identical.
Should I minify in development?
No. Use unminified CSS for debugging. Minify only for production builds.
Does it handle CSS variables?
Yes. Custom properties (--var) are preserved. Only surrounding whitespace is removed.