Generate a page's critical CSS
Performance Metrics:
Basic CSS Performance
CSS File Size: KB
Critical CSS Performance
CSS File Size: KB
Performance Improvements:
CSS File Size Reduction: KB (%)
FCP Load Time Improvement: %
LCP Load Time Improvement: %
Implementation Code
In practice
Enter a page URL to extract the CSS needed for its initial display. Test the result on a copy of your site before integrating it. Check different screen sizes and interactive elements: critical CSS supplements your stylesheet rather than replacing all your styles.
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