Lazy Loading Image Checker

Real HTML scan

Is this page lazy-loading its images correctly?

Enter any page URL to scan every image tag on it - native lazy loading, JS lazy-load libraries, missing dimensions, and missing alt text, all read straight from the live HTML.

Every result comes from the page's actual HTML - nothing is estimated from a screenshot or cache.

Fetching and analyzing images…

Loading Health Score

#	Image Source	Status	Position	Dimensions	Alt

About Lazy Loading Image Checker

Lazy Loading Image Checker scans a live page's actual HTML for every image tag and reports whether each one uses native lazy loading (loading="lazy"), a common JS lazy-load library pattern (data-src, data-lazy-src, lazyload classes), or loads eagerly with no lazy-loading at all. It flags the two most common real mistakes: above-the-fold images that are lazy-loaded (which can delay your Largest Contentful Paint) and images anywhere on the page missing width/height attributes (a leading cause of Cumulative Layout Shift). Every finding is read directly from the page's HTML - nothing is estimated. If AI is configured on this site, you can also generate a prioritized, plain-English fix list from the findings.