Preview is described as 'Native macOS tool for viewing, annotating, and editing images and PDFs, offers cropping, resizing, markup tools, page rearrangement, and export to multiple formats' and is a very popular PDF Reader in the photos & graphics category. There are more than 100 alternatives to Preview for a variety of platforms, including Windows, Mac, Linux, Android and iPhone apps. The best Preview alternative is SumatraPDF, which is both free and Open Source. Other great apps like Preview are Okular, IrfanView, XnView MP and ImageGlass.
WinQuickLook allows you to select a file in Windows Explorer or on your desktop and then simply press the spacebar to see the contents of the file without having to open it with a special application.
Phatch is an user friendly, cross-platform Photo Batch Processor and Exif Renamer with a nice graphical user interface. Phatch handles all popular image formats and can duplicate (sub)folder hierarchies.
qAllInOne (aka qAIO) is a free open-source software built using Qt to provide users an All-In-One media player, so it can view images, play videos and audio.
Simple macOS PDF reader with ChatGPT integrated. You can chat with your local PDF. The returned response can cite the page number to ensure correctness.
An attorney who deals with a lot of PDFs set himself with the task of finding a way to preview the PDFs in Windows Explorer (much like Cover Flow view already does in Mac OS X) without actually opening them.
WildBit Viewer is popular, extensive & fast image viewer which includes viewer, slide show, editor, search, profile switcher and multi screen viewer.
Quick Picture Viewer is a lightweight, versatile desktop image viewer for Windows. The best replacement for the default Windows photo viewer.
This is a Free & Fast Image Viewer and Editor for Windows. There are many tools around doing that, but the aim of this Freeware is to be a small and handy tool doing what it says and running also as a standalone exe file (installer not necessary).
ViewPic is a lightning fast and image viewer for Mac OS X, you can quickly browse through all images in a folder.
Redact & Annotate images. Hide or mark up essential parts of your image by simply clicking and dragging on it.
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