Image CDN
A content delivery network specialized for images that automatically optimizes, resizes, converts formats, and caches images at edge servers worldwide.
Image CDNs go beyond traditional CDNs by performing real-time image transformations at the edge. When a browser requests an image, the CDN can resize it for the device viewport, convert it to the best supported format such as AVIF, WebP, or JPEG fallback, adjust quality based on delivery rules, and cache the result at the nearest edge server. This reduces the need to pre-generate multiple image variants. Popular services include Cloudflare Images, Imgix, Cloudinary, and Bunny Optimizer. For web performance, image CDNs often reduce image payload compared with serving original files, which can improve Largest Contentful Paint (LCP) when implementation, caching, and responsive markup are configured correctly. URL-based APIs allow transformations through query parameters such as width, height, format, and quality, making integration straightforward for many web stacks.