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Home / Tips and Tricks / The easiest way to resize photos on your iPhone in bulk or individually «iOS & iPhone :: Gadget Hacks

The easiest way to resize photos on your iPhone in bulk or individually «iOS & iPhone :: Gadget Hacks

The rear cameras on iPhones have stayed at 12 megapixels since the iPhone 6s, but with every new iPhone model, more data goes to photos. That means larger files. If you’re having trouble with your images being too big, whether you’re sharing or uploading them, there’s an easy way to resize an image or a group of images with a shortcut.

You can do it preventively by changing the way you take photos with your iPhone, such as changing your shooting mode, file format, lighting conditions, and lighting. But that works harder than necessary since you can take pictures with your camera without having to think too much about configuring anything.

Apple has built a few things into iOS that make sharing larger images easier. For example, you can reduce the size of a picture when you attach it to an email in Mail. And in Messages, you can choose to always send low-quality images, which can help you save data and avoid sending errors. But if you̵

7;re using a different app, you probably won’t see such options.

That’s where a shortcut comes in handy. You can quickly make copies of selected photos with the correct ones, by changing the resolution for one image or even dozens. This is good for when you want to share an image or group of photos with others, upload images to a website or app, or just give people lower quality versions of your media so that you remain the custodian of the originals. You can then delete all smaller copies in Photos when you no longer need them.


Make sure you are using iOS 14 or later. It may work in iOS 13, but we haven’t tested it. You also need the Shortcuts app, so if you deleted it for some reason, you can get it back from the App Store. In Settings -> Shortcuts, make sure that “Allow untrusted shortcuts” is enabled to add user-created shortcuts.

The shortcut we are using also uses UpdateKit so you’ll want to download that too to make sure the shortcut stays up to date. If you have it and are having trouble with UpdateKit, you can remove all UpdateKit stuff from the image resizing shortcut to avoid that.

Step 1: Add the shortcut

Image Resizer, also known as Bulk Resize, is a shortcut created by RoutineHub user jacro__edu. This allows you to resize dozens if not hundreds of images from within the Photos app. The original images will remain untouched, but newer versions will be created at the top of your Photos app at the resolution you choose. You can get the shortcut directly from the link below or from RoutineHub, which updates the shortcut regularly.

After clicking “Get Shortcut”, you can view the contents of the shortcut in the Shortcuts app. Scroll through these actions until you get “Add Untrusted Shortcut”. Tap that to add it to your library. When it asks you to configure the shortcut, tap “Done” as there is nothing to configure.

Step 2: Resize your photos

In the “My Shortcuts” list, tap “Bulk Resize” to resize images. The first time you launch the shortcut, you must give it access to the Photos app – tap “OK” to do that.

Now choose all the photos you want to resize, including Live Photos, portraits, panoramas, animations and more. Unfortunately, videos cannot be resized with this shortcut. Once you’ve selected all the images you’d like to resize, tap “Add” in the top right. Then you will be asked to resize the selected images.

Depending on your settings, the dimensions of your original photos may vary depending on your shooting mode and any crops you have made. Full-sized photos for most iPhones with 12MP shooters will be 3,024 by 4,032 pixels. The size of the screenshot depends on the screen resolutions of your iPhone. For example, the screenshots of my iPhone 11 Pro are 1,125 by 2,436 pixels.

Image Resizer only resizes photos, but that also reduces file size. When Image Resizer asks you, “How big?” it refers to the longest side of the image in pixels. By default, it always displays 1024 as the size to shrink the images, but it can be anything you want, even 20 if you want it that small.

1024 pixels is a good starting point, where you don’t sacrifice much quality, but you can obviously go lower. It doesn’t matter which number you choose, the longest side is automatically adjusted accordingly and the short side is reduced proportionally. Once you’ve chosen a size, tap “Done” to start the compression process.

You can also increase the size of your photos, but there is no reason for that. If you choose an odd number of pixels, such as 5,000, the photo will increase in pixels, but the file size shouldn’t increase that much, especially if the photo is already of good quality. You can even degrade and pixelate the image.

Before the process starts, the shortcut may ask for access to your other shortcuts. It does this to use UpdateKit to automatically update in the background. But again, as said before, if you are having trouble with UpdateKit, you can remove that part of the shortcut workflow. Tap “OK” to continue.

After a while, which can take a few minutes if you resize hundreds of photos, a check mark will appear on the shortcut to indicate that the resizing is complete. Then you can go to Photos and see your recently resized and compressed photos, which should show up as new recent photos. Tap a photo to check the quality, which may not even be discernible if you keep it at 1024 pixels.

Step 3: Check the dimensions of resized images (optional)

Using an app such as Image Size or Photo Size Editor (see below), you can see the difference between your normal iPhone photos and the ones that have been resized with this shortcut. Below is the image on the left, not scaled down, with a size of 2448 by 3264 pixels by 9.2 MB. The photo on the right has been resized using the Image Resizer shortcut and now comes out at 768 by 1024 pixels by 266.7 KB. If you look closely at the photos on the iPhone, you will hardly see that they have different sizes.

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Cover photo and screenshots by Nelson Aguilar / Gadget Hacks

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