IrfanView is a lightweight and versatile image viewer and editor for Windows. It supports a wide range of file formats, including popular ones like JPEG, PNG, and GIF. Users can easily view, convert, and edit images, making it a handy tool for both casual users and professionals. In addition to basic viewing and editing features, IrfanView offers advanced options such as batch processing, slideshow creation, and the ability to add text or watermarks to images. Its user-friendly interface and fast performance make it a popular choice for those looking to manage their image files efficiently.