CSS Minifier - Compress CSS Online Free
Last Updated: April 1, 2026
Last updated: 2026-03-11
Your CSS file is 180KB. After minification it is 120KB. 33% reduction with zero visual change.
What Minification Removes
| Element | Before | After | Savings |
|---|---|---|---|
| Comments | /* Header styles */ | (removed) | 100% of comment bytes |
| Whitespace | margin: 0 auto; | margin:0 auto | ~15% |
| Newlines | One property per line | One line | ~10% |
| Last semicolons | color:red;} | color:red} | ~2% |
| Zero units | margin: 0px | margin:0 | ~1% |
Typical Savings
- Small CSS (under 10KB): 20-25%
- Medium CSS (10-100KB): 25-35%
- Large CSS with comments (100KB+): 30-50%
Minify your CSS - free, instant.
Open CSS Minifier →Related Tools
According to Google web.dev, minifying CSS is a core performance optimization.
As Lighthouse flags, unminified CSS affects page load speed.
Frequently Asked Questions
Is this coding tool free?
Yes, all developer tools on TXT1.com are free to use without registration.
What programming languages are supported?
We support JSON, XML, HTML, CSS, JavaScript, SQL, Base64, and many more formats.
Is my code secure?
All code is processed locally in your browser when possible, ensuring maximum privacy.
Can I use this for production code?
Yes, our tools are used by thousands of developers for real-world projects every day.
Do you offer an API?
API access is available for high-volume users. Contact us for details.
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Why Choose This Tool
Files processed in your browser. Nothing uploaded.
AI-powered processing in seconds, not minutes.
No hidden fees, no signup, no limits.
Any device, any browser. No installation needed.
How It Works
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Drop your file or paste content into the input area
Process
Click the button and let AI do the heavy lifting
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User Reviews
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