Modern websites load massive CSS files that block rendering. Your users wait, watching blank screens, while browsers download and parse unnecessary styles.
Large CSS files delay First Contentful Paint
Slow load times hurt SEO and conversions
Blank screens lead to higher bounce rates
Critical CSS extracts only the styles needed for above-the-fold content
Analyze your page and identify CSS rules needed for initial render
Inline critical CSS directly in HTML for instant rendering
Load remaining CSS asynchronously without blocking
Everything you need to optimize your CSS
Set it and forget it with our API
Optimize for mobile, tablet, and desktop
Fine-tune extraction for your needs
Integrate seamlessly into your pipeline
Track improvements over time
Enterprise-grade security and reliability
See the impact of Critical CSS optimization
Start generating critical CSS in seconds. No credit card required.