imgproxy
self-hosted, proxy

imgproxy is a fast and secure standalone server designed for resizing and converting remote images. It excels in situations where there's a need to resize multiple images on the fly without the hassle of preparing numerous cached resized images or redoing the process every time the design changes. Released under the MIT license and implemented in Go, imgproxy offers efficient image manipulation capabilities with Docker and Kubernetes support. Its seamless integration enables users to dynamically resize and convert images on-demand, ensuring optimal performance and flexibility in various web applications and services.