Choose whether you want to resize according to pixels, percent, inches, cm, mm or points.

This means you can only change one dimension, length or width, but it means everything will be adjusted equally.

Now, assuming want your image to look the same after – rather than stretched or squat, you need to make sure that Scale proportionally is selected.

Choose Adjust Size (you can also open this menu by clicking on the square with arrows icon in the menu bar).

Double click on the image – this should open the image in Preview, if it doesn’t, close it and right click to choose Open With and select Preview.

Locate the image (either using the Finder, or on your Desktop).

Want to get into more advanced image editing? Check out our roundup of the best image editing tools for Windows, and stop by our list of the best photo editing laptops if you want to do this more professionally. There are plenty of other options for both Windows and macOS if you want to use third-party tools, but this is probably easier for most people. It's only really a bit more troublesome to set up the first time, but it saves you a lot of time in the long run. As a Windows user, PowerToys is my go-to for resizing images now, since I can work with multiple images with just a few clicks. It's admittedly a bit easier to get this done on macOS, but it's not a difficult process either way. Then, in Preview, make sure you select the thumbnails for all the images you want to resize before using the Adjust Size option.Īnd that's about it. First, select all the images you want in Finder and open them with Preview. If you want to resize your images in bulk, the process is similar, but there are a couple of things you need to pay attention to.

When you resize an image, you can also set custom dimensions each time, so it's up to you what sizes you want available more quickly. You can change the existing presets or add a new one. If you want to set up the Image resizer so it's always set to use specific sizes, you can customize the size presets it offers.Launch PowerToys and switch to the Image Resizer tab.Download the latest version of PowerToys, available on GitHub, and install it.PowerToys actually has a lot more tools than the image resizer, but that's what we're focusing on for now.

My personal favorite is PowerToys, which is also published by Microsoft and developed in collaboration with the open-source community. If you want to resize multiple images at once, there are some tools you can download to help you out with that. The two methods above work well if you just want to resize an image or two, but if you have a folder with a ton of large images, that's going to get tiring after a while. This is another easy method for resizing images, and it's the one I personally used most frequently for a long time.

How to change image size in mac