IrfanView is described as 'Fast and powerful image viewer, editor, and converter for beginners and pros. Supports various formats, batch processing, and many extensions' and is a leading Image Viewer in the photos & graphics category. There are more than 100 alternatives to IrfanView for a variety of platforms, including Windows, Linux, Mac, Flathub and Web-based apps. The best IrfanView alternative is XnView MP. It's not free, so if you're looking for a free alternative, you could try XnView MP or nomacs. Other great apps like IrfanView are ImageGlass, XnView Classic, qView and JPEGView.