Cesium Image Compressor is a simple application that allows you to recompress any image on your hard drive. This takes up a lot less space and loses minimal quality in the process.

Using the program is very easy. You just have to drag one or more images (which can convert large groups of photos) into the window, select the degree of compression you want by sliding the quality tab from 1 to 100, and finally press “compress” increase.

The more compression you apply to your photo, the less space it will take up on your hard drive, but the lower the quality. So while you can reduce the size of your files by up to 90%, the results are usually unsatisfactory, so it’s best to maintain a balance between high quality and a small reduction in size.