nsxiv is a command line image viewer tool designed for simplicity and efficiency. It is written in C programming language and supports various image formats, including JPEG, PNG, GIF, and many more. The tool is built using the Xlib library, making it lightweight and fast. nsxiv allows users to view images in a terminal window, providing a simple and distraction-free viewing experience. It features basic image manipulation options like zooming, panning, and rotation, which can be executed using keyboard shortcuts. nsxiv also supports image thumbnailing for faster browsing of large directories containing multiple images. Overall, nsxiv is a minimalistic yet powerful command line tool designed to provide a seamless image viewing experience within the terminal.