2026-08-26
LCP (Largest Contentful Paint) is the core metric for measuring page loading experience, and images are often the biggest bottleneck. The good news: three fixes that work entirely in the browser with zero server configuration needed.
WebP and AVIF are 25-50% smaller than JPG/PNG at the same quality. For LCP images, format choice alone can halve load time. Use our browser-local compressor to convert JPG to WebP without uploading anything.
LCP images should NOT be lazy-loaded! But non-LCP images below the fold should use loading='lazy'. The correct pattern: preload the LCP image, lazy-load everything else. Wrong lazy loading is a common LCP killer.
Missing width/height attributes cause layout shifts (CLS) and confuse the browser's preload decisions. Always set explicit dimensions so the browser can calculate layout correctly before the image loads.
No. LCP elements should be fetched immediately. Lazy loading the LCP image is one of the most common LCP mistakes.
Usually 25-35% smaller at equal quality. On LCP images, that difference directly translates to better performance scores.
Yes. Right format, correct dimensions, and proper lazy loading are all browser-side fixes with zero server config.