Frequently Asked Questions

Critical CSS is the CSS required to render the "above-the-fold" content of your page. By inlining this CSS, you eliminate render-blocking resources and significantly improve First Contentful Paint (FCP).

A low score is often caused by render-blocking CSS and JavaScript. Our generator extracts the critical styles needed for the initial view, allowing you to defer the rest, which boosts your Core Web Vitals.

Yes, our generator works with any public URL. Whether you use WordPress, Shopify, Magento, or a custom stack (React, Vue, Laravel), we can extract the Critical CSS.

Above the fold refers to the portion of a webpage that is visible without scrolling. Optimizing this area is crucial for perceived performance and user retention.

Ideally, yes. Different pages (Homepage, Product Page, Blog Post) have different layouts and styles. For the best results, you should generate specific Critical CSS for each template type.

You should regenerate it whenever you make significant design changes to your site. If you change colors, fonts, or layout structures, your Critical CSS needs to be updated.

No. Critical CSS is just a subset of your existing styles. The full stylesheet is still loaded asynchronously to style the rest of the page as the user scrolls.

Critical CSS is what is *needed* immediately. Unused CSS is code that is never used on a page. Our tool focuses on extracting what is needed, which implicitly helps you identify what is critical versus non-critical.

Yes! Our generator analyzes your site on both desktop and mobile viewports to ensure the generated CSS works perfectly across all devices.

Dedicated generators often provide more accurate results than generic plugins because we use a full headless browser engine to render your page exactly as a user sees it.

Critical CSS is the minimum set of CSS required to render the above-the-fold content of a web page. By inlining this CSS, you can significantly improve the First Contentful Paint (FCP) and perceived performance of your website.