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Critical CSS Extractor

Extract critical CSS from your HTML and CSS to improve page load times and performance. This tool helps you identify and separate the CSS needed for above-the-fold content.

HTML Input

CSS Input

What is Critical CSS?

Critical CSS is the minimal CSS required to render the above-the-fold content of a webpage. Extracting and inlining this CSS can significantly improve page load times by:

  • Reducing render-blocking resources
  • Displaying content to users faster
  • Improving Core Web Vitals metrics like First Contentful Paint (FCP)
  • Enhancing the perceived performance of your website

The non-critical CSS can be loaded asynchronously after the page has rendered, further optimizing the user experience.