Lazy Load Optimizer (lazy-load-optimizer) free WordPress plugin

Lazy loading images and iframes to speed up sites page load speed. Compatible with WooCommerce.
This plugin uses lazysizes – is the most popular, high performance and SEO friendly lazy loader for images.
Plugin demo

Features

• Lazy loading images inserted in posts, pages, custom post types, text widgets;
• Lazy loading image gallery, image widget, image gallery widget;
• Lazy loading product images, product category images in WooCommerce;
• Lazy loading iframes;
• Improves PageSpeed Insights Results, fixes error “defer offscreen images”;
• Lightweight and fast.