In some cases, we may need to enlarge an image in order to see its more details. For high-definition pictures, if just zoom in several times, its quality can still make users satisfied; But when you need to enlarge it to more than ten times or even dozens of times, that must cause a sudden drop on quality and the appearance of jagged image (also called Mosaic). As to low-resolution images, the situation is even worse.

Although Microsoft Windows has a built-in magnifying glass tool, yet it is far from convenient and powerful compared with this free on-screen Magnifier.