If you wish to resize only one dimension, say the height, be sure to select “Scale Proportionally.” Otherwise, you’ll end up with images that are scaled disproportionally. To use these, click on “Fit into,” and then select the dimensions you want from the dropdown box. The app also allows you to select the most common, predetermined dimensions. Proceed to enter your desired width and height values.Click on “Tools” and then click on “Adjust Size.” This will launch a new window where you’ll be prompted to enter various details about the images.To do so, click on “Edit,” and then “Select All.” In Preview, select all the images you’d like to batch resize from the left side thumbnail drawer.You can even refine your images further by removing any items you may have selected by mistake. You can scroll through the list to view specific items in the main panel. To do so, select all of the images, then right-click, and then select “Open with” and click on “Preview.” At this point, Preview will display all the images selected on the left-hand side thumbnail drawer. In Finder, click on all the images you’d like to resize and then open them with the Preview app.
#Batch resize images mac os x software#
Preview is a powerful yet easy-to-use software that’s designed to resize multiple images in one fell swoop. By default, this new folder will be created on the Desktop, but you can choose another location using the Where dropdown list.How to Batch Resize Images on a Mac With Preview
After this, the New Folder action is put in place at the beginning of the workflow, with some options on the action box.Įnter a name for the new folder in the Name box. Next, find the New Folder action in the second column and drag it to the workflow on the right. Select Files & Folders under Library on the left. Make sure Actions is selected right under the toolbar. Create a New Folderįirst, we're going to have Automator create a folder to place the converted and resized images into. In essence, you're building a step-by-step process that tells Automator what to do with the files you give it. The process of building an Automator workflow involves selecting the type of Action or Variable you want and then dragging it into your workflow. There are two main sections on the Automator window: Actions and Variables are on the left, while the workflow is on the right. On the Choose a type for your document dialog box, click Application and then hit Choose. Open Automator from your Applications folder (or search for it using Spotlight with Cmd + Space) and click New Document. Once you create a workflow in the Automator app, save it as an application, and add it to your Dock, you can simply drag and drop images onto the icon. Using a custom Automator app to batch convert and resize a group of images is faster than using Preview. Don't be intimidated by Automator-it's easy to use. Note that if your images are all different sizes, you may want to use percent, because it's relative to the original size.īatch Convert and Resize Images Using AutomatorĪutomator is a powerful, built-in utility on your Mac that allows you to create custom automation apps without knowing any coding.
If you want the Height to adjust automatically when you enter the Width, or vice versa, make sure to check the Scale proportionally box.Įnter values for one or both the Width and Height and click OK. Select Tools > Adjust Size from the menu bar.Ĭhoose the units you want to use (pixels, percent, inches, cm, mm, or points) from the dropdown box to the right of the Width and Height fields. From there:Ĭlick in the left pane then press Cmd + A, or click Edit > Select All from the menu bar to select all the images. If you have the Preview icon on your Dock, you can also drag the selected files onto the Preview icon to open them. In Finder, select a group of image files, and right-click on them. One hidden but useful feature is the ability to batch convert and resize a large group of images with Preview. The built-in Preview app has been around a long time on macOS, and you can do much more with Preview than just view images. But you can also do each separately on your batch of images.īatch Convert and Resize Images Using Preview We'll also introduce a couple of third-party apps that will do the trick with some extra features thrown in.įor this guide, we'll combine converting and resizing. Instead of changing each image separately, there are easy ways to quickly batch convert and resize images on your Mac.īelow, we look at using the built-in tools in Preview and Automator to batch convert and resize images. Do you work with a lot of images at one time? Maybe you have a large group of images you need to resize to a consistent size and convert from PNG to JPG.
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