When comparing XnView vs FastStone Image Viewer, the Slant community recommends FastStone Image Viewer for most people. In the question“What are the best image viewers for Windows?” FastStone Image Viewer is ranked 1st while XnView is ranked 3rd.
Ranked in these QuestionsQuestion Ranking
Pro Includes simple editing tools
Typical image editing tools are included. For instance, there are tools for color and size manipulation, several filters and effects.
Pro Supports over 500 image formats
Pro Available for macOS, Linux and Windows
Pro Easy redate and view configuration
Pro Compare images side-by-side
To delete blurry phone pics, etc.
XnView speaks over 30 languages.
Pro Portable version for Windows available
Pro Really fast
Pro Great for comparing and sorting multiple images
Pro Lots of features for simple editing
Pro Best keyboard controls
Pro Editing photo levels
Con Free only for private use
For use in a company 1 license starts at 26 EUR.
Con Doesn't show movies on phone in correct position
Some of mp4 files shows in upside down position.
Con Doesn't pan/zoom fluidly with touchscreen
Con No rating of photos
Con Sometimes really sluggish
Showing the wait cursor for multiple seconds like executing large operations in the GUI thread.
Con Free version is not valid for business usage
Only good for private use, small business licensing is very expensive.
Con Broken SVG Support
SVG images do not show at all (at least for me)
Comment if otherwise
Con Cannot sort/filter by EXIF data
Many times it's useful to sort by the time/date your photos were originally taken