How to Fix a Slow Largest Contentful Paint (LCP)
LCP measures how fast your main content loads. Under 2.5 seconds is the target. Here is how to find what is slow and fix it.
Reviewed by Jacob Rhinehart for Strelva's co-founder; products and operations lead responsibilities.
Largest Contentful Paint, or LCP, measures how long it takes for the main content of your page to appear. Google considers under 2.5 seconds "good," and it directly affects rankings and how fast your site feels. On most sites the LCP element is the hero image, the headline, or the main content block.
Why LCP matters
A slow LCP means visitors stare at a blank or half-loaded screen, and many leave before the page finishes. It is also one of the Core Web Vitals Google uses as a ranking signal, so a poor score costs you both conversions and search position.
How to fix it
- Measure first. Run your page through PageSpeed Insights and note your LCP and which element it points to. Fix that element, not random things.
- Optimize the LCP element. If it is an image, compress it, serve a modern format (WebP or AVIF), size it correctly, and add fetchpriority="high" so the browser loads it first.
- Preload critical resources. Preload the LCP image and any fonts the headline depends on so the browser does not discover them late.
- Remove render-blocking resources. Defer non-critical CSS and JavaScript so they do not hold up the first paint.
- Improve server response time. Aim for a Time to First Byte under 600 milliseconds. Caching and a faster host help here.
Verify the win
Re-run PageSpeed Insights and confirm LCP is under 2.5 seconds on mobile, since mobile is what Google measures most. Because lab scores and real-user data can differ, watch the Core Web Vitals report in Search Console over the following weeks to confirm real visitors see the improvement.
If your site runs on a managed platform where you cannot edit the underlying code, this is exactly the kind of fix a site-management service handles for you.
Frequently asked
What business owners ask next.
What is a good LCP score?
Under 2.5 seconds is good, 2.5 to 4 seconds needs improvement, and over 4 seconds is poor. Google measures mobile LCP for ranking, so optimize for mobile first.
Why is my LCP good in tests but poor in Search Console?
Lab tools test one load on a fast connection. Search Console reports real users on varied devices and networks. Trust the field data and test on a throttled mobile connection to reproduce what real visitors experience.