Use this skill when the user wants to remove unused CSS from stylesheets by analyzing the actual HTML or templates used in their project.
Scanned 9/6/2026
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---
name: uncss
description: Use this skill when the user wants to remove unused CSS from stylesheets by analyzing the actual HTML or templates used in their project.
---
# UnCSS Plugin
UnCSS removes unused CSS rules by scanning HTML/JS templates against stylesheets.
## Usage Examples
- "remove unused CSS from styles.css based on index.html"
- "purge unused CSS across multiple HTML pages"
- "generate a lean CSS file for production"
- "analyze CSS coverage across templates"
## Installation
```bash
npm install -g uncss
```
## Key Features
- Unused CSS rule removal
- HTML/JS template scanning
- Multiple page/file support
- PhantomJS and Puppeteer backends
- CSS file size reduction
- Production-ready lean CSS generation
- Media query preservation
- Ignored selector configuration
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