XnView Image Viewer

XnView is a versatile, free-for-personal-use image viewer and organizer developed by Pierre-e Gougelet, first released in 2004 and maintained continuously for over two decades. The software supports reading more than 500 image formats including JPEG, PNG, GIF, BMP, TIFF, RAW formats such as CR2, NEF, ARW, DNG, ORF, WebP, and PSD, while also offering batch conversion and renaming capabilities for up to thousands of files at once. XnView MP is the modern cross-platform successor with identical core functionality available for Windows, macOS, and Linux. Companion tools in the XnSoft suite include XnConvert for batch image processing, XnResize for batch resizing, XnRetro for vintage photo effects, XnSketch for pencil-sketch conversion, NConvert as a command-line utility, and XnShell as a Windows Explorer context-menu extension.