Preview lets you control every detail, from the number of pixels to the dimensions in inches.
You could also choose to transform the image as a percentage of the original or go completely custom. Finally, the app gives you an option to modify images according to a range of preset sizes, such as x pixels.
Now the resized image will show in the Preview window, and you can keep trying out new sizes until you are happy with the end result. With Preview, you can also change the file format. Some of these could potentially improve the quality of the formatting as well.
Another option is to use PhotoBulk, an image editor designed specifically for bulk resizing , but which can also be used to resize individual images. PhotoBulk puts all of the menu options in one convenient window, along with a real-time preview feature and the option to apply watermarks at the same time.
To resize an image with PhotoBulk :. Sometimes you need to resize multiple images at once. Although probably not your best option, Preview does allow for batch resizing:.
The downside of using Preview for batch resizing is that you have to process all the images at the same time. PhotoBulk, on the other hand, provides much more control and the ability to modify the size of individual images without needing to apply those same dimensions to every image:. Overall, whichever option you choose for resizing images, Preview or PhotoBulk, it should now be fairly easy for you to do so.
Overall, whichever option you choose for resizing images, Preview or PhotoBulk, it should now be fairly easy for you to do so. You have two easy options that allow you to resize images on Mac: either using the default Preview app or more advanced PhotoBulk. All Rights Reserved. Create account. Active 2 years, 10 months ago. Question feed.
Your best bet is probably to use Preview for single images and PhotoBulk for multiples ones. Just make sure you input the right dimensions and don't forget to save the original if you need to keep a higher resolution version for later.
Best of all, PhotoBulk is available for a free trial through Setapp , a platform of over useful apps and utilities for macOS. Another trick up your sleeve. To resize an image with PhotoBulk : Open up the app Drag and drop your image onto the window Check Resize option from the left-side menu Select the type of resizing you need Click Start Resize multiple images at once Sometimes you need to resize multiple images at once. Save a copy of the file! In OSX In the example below, Preview is set to pixels.
You will also see the size of the file in MBs. You will also see the resolution, which in the example is Most photos on the web can be much, much smaller than the example above. File Size You want the file size to be as small as possible. All the photos on this page are less than 50 KB 0.
The last step is to save the file. Preview gives you several options of file types, but the most common is JPEG.
The main reason to switch is if the picture has a transparent background, you will have to use PNG. In the image below, you will see that you have a slider that allows you to adjust the quality of the image. Skip to content.