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As you can see in the example, adjusting the quality to 50% resulted in a dramatic decrease in file size.

This is where the balance between file size and image quality comes into play, the side by side (before and after) image comparisons are a great help and a little trial and error will soon have you on the right track. To reduce output file size, drag the Quality slider to the left and make any fine adjustments via the numerical display: Here you will be presented with side by side views of the image plus a slider and numerical indicator which can be used to adjust the degree of compression: In the ensuing window you will see that image quality is currently set at 100%, now click on the Options button: Open your photo in FastStone Image Viewer and move the mouse cursor over to the far left side of the window to initiate FastStone’s popup edit menu, then click on the option to Save As: So, the greater the degree of compression the greater the loss of quality – the trick is to strike a compromise balance between resulting file size and image quality: In this guide I’m going to show you how to reduce an image’s file size while leaving the actual physical size intact.Īssuming your photos are saved in JPEG format which is standard for most systems: JPEG is a lossy compression format which, in layman terms, means the degree of image compression can be adjusted but with a corresponding loss of quality. I have previously shown you how to reduce the physical size of photos/images using FastStone Image viewer, in order to make them more email/share friendly – you can view that previous article HERE.