Automatic Image Optimizer & CDN by wpimg.io

io is a WordPress plugin designed to improve website performance by optimizing images and delivering them through a global edge network. The tool addresses the common issue of unoptimized images slowing down WordPress sites, which can negatively impact visitor retention and conversion rates. By processing images in the cloud rather than on the user's server, it reduces server load and helps enhance metrics such as the Largest Contentful Paint score, which is important for Google's page experience evaluation.

The plugin operates with minimal setup—users install it, enter a license key, and image optimization begins automatically without requiring any configuration or technical expertise. It supports JPEG, PNG, GIF, and WebP images, and automatically serves them in efficient formats such as WebP or AVIF based on browser compatibility. The optimization process typically reduces image file sizes by 30–80% while maintaining visual quality. The plugin is compatible with most WordPress themes, page builders, and WooCommerce, and works by modifying the HTML output so users do not need to re-upload existing images. Original images remain unaltered, and if the plugin is deactivated, the site simply reverts to serving the original files.

Image delivery is handled via Cloudflare's worldwide edge network, ensuring fast load times for visitors globally. io's infrastructure, so hosting resources are preserved for other tasks. Once an image is optimized, subsequent requests are served instantly from the CDN, with only the first request experiencing a brief delay.

90 per WordPress site per month. The plan offers unlimited image transformations, global CDN delivery, support for modern formats, and a 14-day money-back guarantee. Licensing and plugin downloads are managed through Lemon Squeezy checkout. The service is developed by Trimbit Ltd. and is based in Finland.