Adaptive Images for WordPress

Adaptive Images is a WordPress plugin that resizes and optimizes images for mobile devices, reducing the total download time of a webpage. It works as a filter between the website and devices, serving smaller images without affecting the theme layout or style. The plugin supports JPEG, PNG, and non-animated GIF formats, but not WEBP or animated GIFs. It also respects search engines and falls back to the original image size if it doesn't recognize a device size. An experimental mode for CDN/Varnish/external caching services has been added, but it cannot handle CSS background images and won't work with CDNs that use a different subdomain for images.