If there is a photo retouching that is carried out many more times than another, that is undoubtedly resizing the photographs. It is not surprising therefore that programs specifically designed for this purpose arise, as is the case with this Winwatermark PhotoResizer.
The only objective and purpose of Winwatermark PhotoResizer is to resize all kinds of photographs, although it also has a conversion tool to convert all image formats to JPG (as it resizes only in this format).
Once converted to JPG, Winwatermark PhotoResizer allows you to change the size by resizing photographs in batches, with hardly any loss of quality in the final resolution (both as if they are pleasing or dwarfing).
You can free download Winwatermark PhotoResizer 32, 64 bit and safe install the latest trial or new full version for Windows 10 from the official site.