CSS Extractor Documentation
Overview: Extract and analyze CSS from web pages to identify optimization opportunities, unused styles, and performance improvements.
Features
- Extract inline and external CSS
- Analyze CSS file sizes and load times
- Identify unused CSS rules
- Detect CSS validation errors
- Performance optimization suggestions
- CSS minification analysis
How to Use
- Enter page URL - Input the URL of the page to analyze
- Choose analysis depth - Select inline, external, or both CSS types
- Run extraction - Tool fetches and processes all CSS
- Review recommendations - Get actionable optimization tips
Analysis Results
Performance Metrics
- Total CSS file size
- Number of CSS requests
- Render-blocking resources
- Critical CSS identification
- Load time impact
Optimization Opportunities
- Unused CSS rules
- Duplicate selectors
- Inefficient selectors
- Missing vendor prefixes
- Minification potential
Best Practices
CSS Optimization Tips
- Critical CSS: Inline above-the-fold styles
- Lazy Loading: Defer non-critical CSS
- Minification: Remove whitespace and comments
- Compression: Enable gzip/brotli compression
- Purging: Remove unused CSS rules
Performance Impact
CSS optimization can significantly improve:
- Page load speeds
- First Contentful Paint (FCP)
- Largest Contentful Paint (LCP)
- Core Web Vitals scores
Integration
Export results for use with:
- Build tools (Webpack, Gulp)
- CSS purging tools
- Performance monitoring
- Code review processes