123 Photo Viewer Review 123 Photo Viewer is a lightweight image viewer for Windows that can monitor the folders of multiple storage locations, including OneDrive. With a no-nonsense display, this program can keep track of thousands of images and is capable of sorting them by name and date. This software also supports GIF format, which is a nice bonus for users who want to get the most out of their tool. This free photo viewer is a powerful alternative to the native Windows photo viewing app, which is not designed to be user-friendly. It is simple and fast and offers a number of advanced features, such as thumbnail generation, support for various image formats, slide shows, and more. It can also be used to create a slideshow and as a wallpaper for your computer. Moreover, it allows you to rotate and crop your photos as well as apply different effects such as blur, negative film, soft light, and more. The software is incredibly easy to use and has a pleasant interface that will appeal to users of all ages. It is simple to navigate and supports the most popular image formats, such as PNG, BMP, JPEG, GIF, TIFF, ICO, etc. It can even open PSD files, which is a rare feature for this type of program. The application has many positive reviews in the Windows Store, which is a testament to its usability. However, some of these reviews mention that the program has a few issues with some image file formats and does not have an automatic scroll function in the thumbnail bar.