image-size is a Node.js library for efficiently determining the dimensions and type of various image formats. It supports a wide range of formats, including JPEG, PNG, GIF, WebP, TIFF, BMP, PSD, and SVG. This package is valuable because it analyzes only the necessary portions of the image file, making it faster and more memory-efficient compared to fully decoding the image. It's often utilized in server-side applications, build processes, and command-line tools.