Image-heavy to conversion-ready

Image optimization is the process of delivering images in the most efficient format, size, and quality for each user and device. Because images often account for the majority of page weight, effective image optimization directly improves load times, Core Web Vitals, and user experience—especially for global, high-traffic applications.

Fastly's Image Optimizer operates at the edge, transforming images in real time as requests are made. Images are resized, reformatted, and compressed dynamically based on device capabilities and request parameters, eliminating the need to pre-generate and store multiple image variants.

Traditional image optimizers often rely on pre-created transformations or origin-side processing, typically requiring static storage for batch-processed images. Fastly's Image Optimizer is edge-native, applying image optimization on demand, closer to the user. Unlike static approaches, optimized images are created dynamically and then cached for future requests. This reduces origin load and accelerates delivery, while saving design and development teams significant time by eliminating the need to create and store each image variant ahead of time.

Fastly functions as a high-performance image CDN by combining global content delivery with real-time image transformation. Images are cached and delivered from Fastly’s edge network, while optimization logic ensures each request receives the most efficient image possible.

Using a CDN image pipeline offloads image processing and delivery from application infrastructure. By handling image optimization and caching at the edge, Fastly reduces origin compute usage and enables applications to scale image-heavy workloads without performance degradation.

Fastly Image Optimizer supports modern formats such as WebP and AVIF, as well as traditional formats like JPEG and PNG. Format selection is handled automatically based on browser capabilities and set parameters, ensuring optimal compression without breaking compatibility.

Yes. Developers can control image optimization behavior through query parameters and configuration, enabling precise adjustments for resizing, quality, format, and cropping. This makes Fastly an image optimizer for web applications that require flexibility and fine-grained control.

By reducing image payload size and improving time-to-first-render, Fastly’s image optimization directly contributes to better Largest Contentful Paint (LCP) and overall page performance—key metrics for both user experience and search visibility.

No. Image optimization is performed at the edge, close to end users. Once an optimized image is generated, it is cached and reused, ensuring subsequent requests are served with minimal latency.

Fastly Image Optimizer integrates seamlessly with existing asset pipelines and CMS platforms. Teams can continue using their current image sources while Fastly handles optimization and delivery transparently through the CDN.

Yes. Fastly’s global edge network is designed to support high-throughput image delivery for media sites, ecommerce platforms, and SaaS applications where image performance and reliability are critical.

Fastly treats image optimization as a programmable capability of the edge. Developers can incorporate image optimization into broader application logic, observability, and security workflows—without sacrificing performance or control.