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CSS Minifier
Minify CSS online by removing whitespace, comments, and redundancy. Optimize your stylesheets quickly.
How to use this tool
- Paste CSS input, pick safe or aggressive optimization mode, then run minification.
- Review compression diagnostics including bytes, lines, and comment reduction.
- Copy or download minified CSS and optional source map/report outputs.
Workflow fit
- Validate minification impact quickly before adjusting build tooling.
- Generate compact CSS snippets for debugging and issue reporting.
- Compare safe versus restructure-based optimization for output tradeoffs.
Optimization guidance
- Use safe mode first when stylesheet behavior is sensitive to selector order.
- Retain important comments only when required for licenses or directives.
- Test critical layouts after aggressive mode to confirm cascade behavior.
FAQ
- What is the difference between safe and aggressive modes?
- Safe mode avoids structural rewrites, while aggressive mode enables restructuring for deeper compression.
- Can I export source maps?
- Yes. Enable source map generation, then copy or download the map output.
- Is minification local?
- Yes. CSS optimization runs in your browser.
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