How to quickly resize multiple images at once on Mac

As a blogger, I manipulate a lot of photos and images. One of my daily routines consists in resizing some images we use on iDB to either reduce their size or make sure they fit right on the site.

There are many different ways you can quickly resize several images at once on your Mac. You can use an Automator workflow or download one of the many apps available to do that job. Or, if you want to quickly resize several images on the fly without too much trouble, you can simply follow one of the three methods below.

Resize image on Mac

How to batch resize pictures on Mac using Preview

1) Select all the images you want to resize.

2) Right-click on them and select Open With > Preview.

3) In Preview, go to Edit > Select All.

4) Once all images are selected, go to Tools > Adjust Size.

5) Enter the width or height value to resize the photos to your liking. If you’re only going to resize the width, for example, make sure “Scale Proportionally” is selected. This will ensure that your images are proportionally resized. Take a minute to explore all the options here.

6) Click Ok. The images are resized and saved to the original location by replacing the original files.

Set Resize values on Mac

That’s all there is to it. If you’re batch resizing images regularly, I’d also suggest the following two methods, which may prove to be more straightforward and will save you the trouble of repetitive tasks.

Use a macOS shortcut to resize photos

macOS Monterey introduced the Shortcuts app on Mac that lets you do many things – you just need to build a shortcut or get one from the internet or friends. We have created a simple shortcut for you to resize one or more images quickly.

Here’s how to use the Shortcuts app to resize one or multiple images on Mac:

1) Go to the iDB Resize Image shortcut link and click Get Shortcut > Allow. Use Mac’s Safari. In Chrome and other browsers, it may take you to the Shortcuts page on the App Store instead of showing the popup to open the shortcut in Mac’s Shortcuts app.

Get Resize Image shortcut on Mac

2) Click Add Shortcut.

3) Open the Shortcuts app and double-click this shortcut to open it. Now, click the settings icon from the top right and make sure Finder is checked under Use as Quick Action. Once done, close this screen by clicking the red close button from the top left of the window.

Enable shortcut for Finder

4) Inside Finder, select one or more images and right-click. Choose Quick Action > iDB Resize Image.

Select Resize Image shortcut in Finder Quick Actions

5) Choose how you want to resize the images – by Size, Percentage, or Longest Edge. As per your selection, set the required parameters and click Done.

Set your photo resize choice

6) Select the location where you would like to save the resized image and click Open.

That’s it! You have successfully resized the image and saved it to your Mac.

Use image resizing websites

Finally, you can also resize images that don’t have any sensitive information using online sites like The entire process is quick and easy.

I have been using iLoveImg for multiple years to resize screenshots and images. But note that you’re uploading the picture to a site’s server. So, please proceed cautiously and avoid using this to resize your bank statement, ID cards, and other sensitive photos.

Image resizing on Mac

By now, you know of three handy methods to resize images for free. I hope this tutorial was helpful.

Finally, you can also open Mac’s App Store and search for “resize image” to see free and paid apps that help you execute this task.

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