How I Solved Lazy Image Resizing Without Slowing Down the Page Load

The article presents a lazy image resizing architecture that stores only original uploads and triggers resizing via the web server's 404 handler on first request. Once generated, resized images are saved to disk and served as static files, eliminating application involvement on subsequent visits. This approach keeps uploads fast, avoids wasting storage on unused sizes, and uses signed URL keys to prevent arbitrary resize abuse.