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How can I improve LCP by optimizing critical CSS?

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How can I improve LCP by optimizing critical CSS?

Asked on Nov 13, 2025

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Improving the Largest Contentful Paint (LCP) by optimizing critical CSS involves delivering only the essential styles needed for the initial render, reducing render-blocking resources. This can be achieved by inlining critical CSS and deferring non-essential styles.

Example Concept: Critical CSS refers to the minimal set of CSS rules required to render the above-the-fold content of a webpage. By inlining these styles directly into the HTML document's head, you reduce the time to first render. Non-critical CSS can be loaded asynchronously to ensure it doesn't block rendering.

Additional Comment:

Use tools like Critical or Penthouse to extract critical CSS automatically.
Ensure that the inlined CSS is minimized to avoid bloating the HTML document.
Load non-critical CSS using the "media" attribute with "media='print'" and switching to "media='all'" once the page is loaded.
Regularly audit and update critical CSS as your design changes to maintain performance.

✅ Answered with Core Web Vitals best practices.

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How can I improve LCP by optimizing critical CSS?

Asked on Nov 13, 2025

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