As camera quality increases, so do the file sizes of each image you take with them. Each megapixel adds a significant amount to your files, and even though storage space is getting cheaper, it is unable to keep up with the ever-growing size of photos and videos we take with today’s smartphones.
Preview, a built-in tool for all Mac users, has a powerful image editor that lets you do a variety of things. Today we will focus on one of these features, the ability to shrink images down to size and keep them manageable for long-term storage either in the cloud or on your device.
Note, however, that before deleting something you have used Preview to shrink, it is best to compare to ensure that the smaller image is still of high enough quality to archive. If it is not, it is better to find out now and switch to a different compression setting than it is to find it years later when there is no longer anything you can recover.
1) Double-click to open the image in preview.
2) In preview, open the File menu.
3) In the File menu, select Export.
4) In the Export As dialog box move the Quality slider to compress the image to the desired size.
5) Click Save to save the new compressed file.