Hello readers 👋, welcome to the 12th blog in our Node.js series! In the last post, we learned how Express simplifies route handling and request processing. Today, we're going to tackle a common real‑world requirement that every backend developer faces: handling file uploads . Whether it's a profile picture, a PDF invoice, or a batch of images, users need to send files to your server, and you need a clean way to receive and store them. Express itself doesn't handle file uploads out of the box. That's where a specialized middleware called Multer comes in. We'll understand why file uploads need special handling, how Multer works, and then build practical examples for single and multiple file uploads. By the end, you'll be able to accept files, store them on disk, and serve them back to clients. Let's jump right in. Why file uploads need middleware When a browser sends a file, it uses a special encoding called multipart/form-data .…