If you want to resize a single image in Windows, you could open it in an application like Paint or Photos and make the change manually. But if you need to resize multiple images, this manual one-by-one method is incredibly time consuming and inefficient.
While there's no simple way to resize multiple images using the built-in tools in Windows 10, there are a number of free third party utilities that can do it for you. One of our favorites is Image Resizer for Windows, a nifty app that integrates directly into your right-click menu and offers a number of powerful options for image resizing and format changes. Here's how to use it so that you, too, will never have to resize multiple images by hand again.
Resize Multiple Images with Image Resizer.