The batch image resize option works with almost all image extensions including GIF, JPEG, JPEG-2000, BMP, Photoshop PSD, PNG, TIFF and even PDF, and you can resize any number of image files at a time. The Preview app improves with every release of the Mac operating system, and one hidden but very useful feature is the ability to batch resize a large group of images. The built-in Preview app has been around for a long time, and you can do much more with it than just preview images. Instead of resizing each image individually, there is an easy way to quickly batch resize images on your Mac.
If you have a large group of images that you need to resize, the good news is that you can do it all in one go.
Preview is a photo and PDF viewer that lets you customize your photo files on a Mac.
This app is available in all versions of macOS. One of the easiest ways to resize a picture on a Mac is by using the Preview application.
How to resize an image on a Mac using Preview
Download a free trial and see how quickly you can find the largest and unused files on your Mac. If you want to find the largest files on your Mac, you can use a special application from Nektony called Disk Space Analyzer.ĭisk Space Analyzer scans your hard drive (or any external disk) and shows you what is taking up the most space on it. Once you’re happy with the result, click the “OK” button.Large images can take up significant space on your Mac’s hard drive, which can cause your Mac to run slowly. Instantly, Preview will tell you the new file size of the image. Then, change the width to around 50% of the original size (You can try out different resolutions.). Then, from the editing options, click the Resize button (It’s the icon with multiple boxes.).įrom the pop-up, first, switch to the “Pixels” option. Click the Edit button from the top toolbar (It looks like a Pen icon.). Now that the photo is open in Preview, it’s time to resize it.
RELATED: How to Change the Default Application for a File Type in Mac OS X If Preview is not set as the default image viewer, right-click, and choose the Open With > Preview (We recommend that you take some time to set Preview as the default image viewer, as it will make your life easier.). Then, simply double-click the file to open it in Preview. First, open the Finder app and locate the image (or images) that you want to resize. Using the Preview app, you can do this for one image at a time or for multiple images at once.