Largest Contentful Paint over 4 s

Warning severity, in the performance tab

Why it matters

The main content takes more than four seconds to appear (field data where available, lab otherwise). Google's threshold for a good LCP is 2.5 s, and LCP is a Core Web Vitals ranking signal.

How to fix it

Serve the LCP element (hero image or heading) early: preload it, size and compress the image, cut render-blocking CSS and scripts, and speed up the server response.

How Crawlune finds it

Crawlune flags Largest Contentful Paint over 4 s automatically on every crawl and lists the affected URLs under the performance tab, where you can filter, inspect each page and export the list to CSV. The free version crawls up to 550 URLs with every check enabled.