If you own a Mac and looking for methods to resize images without losing quality, then this article will definitely help you. For many reasons, you may need to resize the images. Sometimes to make more space on your device or to transfer files quickly.

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Steps To Resize Images On Mac

There can be many ways to resize images on Mac without losing quality. But here we are covering four major ways which are not very technical. So, let us begin with these basic methods.

1. Resizing in Preview:

When you double-click on an image on your Mac, Preview is the application that opens it up by default. You will be surprised to know that it is already a good application to resize images. To resize an image, open it into Preview, and go to Tools > Adjust Size in the menu bar.

The window provides you information about the size and resolution of the selected image. You can manually type the dimension to resize the selected image. If you are resizing the image for printing purpose, then 240×300 resolution will be the best. If you are posting an image which will be viewable on the website, then 72×150 resolution will work well.

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Also Read: 27 Cool Mac Tips & Tricks You Probably Don’t Know: Part I

2. Resizing through e-mail:

If you are looking for a faster way to resize images, then email can help you. Simply drop the image into the email application of your Mac.

The bottom of the composition box, of email you will see the dimensions of the resized photo before you email it. You can change it to Small, Large, or Actual Size, so if you want to compress the image you can select small from the bottom of the image.

The best part about using email to resize an image is that it doesn’t resize the original one. It makes a copy and then resizes it. But to get the resized image you need to send the email, if you will try to drag out the image from drafts it will not be the resized one.

3. Using a website to resize image:

There are so many websites which claims to resize the image without losing quality. Some of these websites allows you to bulk upload images and after resizing you can bulk download them. On the web page, you can see the detailed log of resizing with the information such as how much percentage of an image is compressed what was the actual image size and compressed image size.

4. Using an application to resize images:

If you find it difficult to resize images using above methods or if you have a large number of images to play with then you must go for a third-party application. When it comes to image resizing applications for Mac Image resizer from Tweaking Technologies is the best app to resize images in bulk. It is an application which not only helps you to resize images but it can also help in bulk rotating and changing format of images in bulk. What you will love about this application is that it shows you preview of the images you can add and remove images even after you have added them to the application.

Some websites demand prefix or suffix for images the application also allows you to add that in a batch of images which makes it the best image resizer for Mac.

You can get this application from the given link.

This is how you can resize images on your Mac without losing quality. These easy tips and tricks will help you in resizing images quickly.

Often times we need to edit photos by resizing them, however the common myth is that you need a Photo Editing App in order to do this. In this article, we are showing you how to Resize Photos on Mac using the built-in Preview app.

Resize Photos on Mac

As mentioned above, you don’t really need a Photo Editing App to resize Photos, you can make use of the default Preview app on your Mac to resize photos.

This method works for Photos located on the desktop and also for Photos located in a Folder, just about anywhere on your Mac.

The only place where this method does not work is within the Photos App on your Mac. However, you can easily get around this limitation by simply dragging your Photos from Photo app to your Desktop or any Folder on your Mac.

Note: When you resize photos using the Preview App, you will end up losing the original photo as it will be replaced by the resized photo. In case you want to keep the original photo, make a copy of the original photo and then resize the copied photo.

Resize Photos on Mac Using Preview App

Follow the steps to Resize Photos on Mac using the Preview App.

1. Double click on the Photo that you want to Resize and allow it to open in the Preview app.

Note: If you have chosen a different App as your default Photo viewer, then right click on the photo and select Open with > Preview.

2. Once the Photo opens in the Preview App, click on Tools from the top menu bar of your Mac and then click on Adjust Size… option in the drop-down menu.

3. On the next screen, make sure that the option for Scale proportionally is checked (See image below)

Making the photo Scale proportionally ensures that any change that you make to the width of the photo will result in a proportional change in the height of the photo and vice-versa.

4. Next, you can choose whether you want to resize the image in pixels, centimeters, inches, percent, millimeters or points (See image below)

5. After selecting the resizing Unit, enter the new dimensions (Width or Height) for your image (See image below)

6. As you can see in the image above, the Preview App also allows you to change the Resolution of the images. This is helpful, in case you are also trying to reduce the size of the image.

Following are the recommended image resolutions for images, based on where you want to use them.

• 72 – 150 pixels – For images to be used on websites
• 240 – 300 – If you will be printing the image
• 600 – If you want the image to be of very high quality, as used in advertising and other uses where high resolution images are required.

7. Finally, click on the Ok button once you have finished resizing the photo (See image in step #5 above)

Resize Multiple Photos on Mac Using Preview App

The Preview app also allows you to resize multiple photos and you can use this option in case you have too many images to be resized.

1. Press the command key on the keyboard of your Mac and then select the Photos that you want to resize

Note: You could also quickly select photos by dragging your Mouse over them.

2. Once the Photos are selected, right-click on one of the photos that you want to resize and then select Open with > Preview option in the contextual menu (See image below).

Note: All selected Photos should open in a single window. Repeat the step above in case the selected Photos open in separate or multiple windows.

3. Next, click on Edit form the top menu bar on your Mac and then click on Select All option in the drop-down menu (See image below).

4. Once the Photos are selected, click on Tools from the top menu bar of your Mac and then click on Adjust Size… option in the dropdown menu.

5. On the next screen, make sure that the option to Scale Proportionally is selected and then enter the new size (Height or Width) for the Photos and click on the Ok button (See image below).

Image Size in Multiple Values?

While trying to Resize images on Mac, you may find the preview App displaying the words “Multiple Values” for Width, Height and Resolution Fields (See image below).

This is happening because the images that you have selected for resizing are in various units of measurement. In such a case, you can still resize images on your Mac by choosing to resize images in Percent (See image above).

Undo Photo Resize

In case you resized a photo to the wrong size, or simply do not like how the resized photo turned out, you can follow the steps below to undo the photo resize.

1. Double click on the Photo that you want to Undo the Resize for

2. Once the Photo opens in the Preview App, click on File from the top menu bar of your Mac and then click on Revert to > Browse all versions in the drop-down menu and contextual menus (See image below)

3. On the next screen, you will be able to browse and choose from the previous saved versions of the Photo stored on your Mac.

4. Simply, select the saved version of the photo that suits your requirements and then click on the Revert button