How to resize an image

There is a virtually endless number of tools to choose from when it comes to resizing pictures. Your Windows 10 desktop or Chromebook already has the vast majority of these handy tools, so you can edit your images quickly without paying for expensive editing software that hogs precious memory space.

This guide will show you how you can resize an image using Photos in Windows 10, Preview in MacOS, and Gallery in Chrome OS. In case you’re not a fan of those apps, we’ll also provide instructions for a web-based client.

Further Reading

Windows 10

Photos App Select Resize

Step 1: Right-click on the image and select Open With followed by Photos.

Step 2: Click the Three-Dot button located in the app’s top-right corner.

Step 3: Select Resize on the drop-down menu.

Photos Save Resized Copy

Step 4: A pop-up window appears. Select one of the three preset sizes (shown on the left). Otherwise, click Define Custom Dimensions for a specific size. Another pop-up window appears (shown on the right).

Step 5: To keep the aspect ratio, click the box next to Maintain Aspect Ratio.

As you enter a number into one of the boxes, the other box will automatically adjust its number in proportion to the number you just entered.

If the aspect ratio doesn’t matter, don’t check the box, and enter the numbers in both boxes.

Step 6: Click the purple Save Resized Copy button.


MacOS Preview Resize Image

Step 1: Right-click on the image and select Open. If Preview is not your default image viewer, select Open With followed by Preview instead.

Step 2: Select Tools on the menu bar.

Step 3: Select Adjust Size on the drop-down menu.

MacOS Preview Change Image Size

Step 4: Enter the width and height information. You may need to switch the size type, like changing from inches to pixels, as shown above. Alternatively, you can select a preset size by clicking the arrows next to Fit Into.

Step 5: Click the blue OK button to confirm the new size.

MacOS Preview Save Resized Image

Step 6: To save the resized image, select File on the menu bar.

Step 7: Select Save.

Chrome OS

Gallery Chrome OS Resize Image

Step 1: Right-click on the image and select Open With Gallery on the pop-up menu. Alternatively, if Gallery is not your default image viewer, select Open With followed by Gallery.

Step 2: Click the Rescale button at the top.

Step 3: Enter the width and height. Click the Chain icon to unlock the aspect ratio if needed.

Step 4: Click the blue Save button. Alternatively, click the blue Down Arrow to select Save As if you don’t want to alter the original image.

Web (Pixlr X)

Pixlr X Select Resize Image

Step 1: Head to Pixlr X.

Step 2: Click the blue Open Image button.

Step 3: Navigate to your image and click Open to upload it.

Step 4: Find the Properties button displayed on the left and click it.

Step 5: Open the drop-down menu and select Resize Image.

Pixlr X Apply Changes

Step 6: Enter the width and height. Clicking the Constrain Proportions toggle will let you lock and unlock the aspect ratio.

Step 7: Click the blue Apply button.

Step 8: Find the blue Save button at the bottom and click it.

Pixlr X Download Resized Image

Step 9: Enter the file name, select your preferred file type, and adjust quality as needed. Once  everything is as you want it, click the blue Download button.

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