I am having a real problem with jpeg images displaying differently in different locations. If I use GIMP to create a jpeg with 100% image quality & 72dpi and then display the image in Microsoft Paint, all is well. The original image viewed on Gimp and the Microsoft Paint version look identical - same size and level of detail. So far so good.
The problem is if I upload the image to Squarespace or even open that same jpeg file in Microsoft Photos App, then they both display a version of the image that is slightly larger and more blurry than my original.