You have probably noticed when you right click on an image in Windows Explorer, there is no option to re-size. Fear not as there is a great little program called “Image Resizer for Windows“, which does just that and much more.
Download it from the CodePlex website. Once installed highlight the image or images (it supports batch re-sizing).
Select Resize pictures and a pop-up window appears.
There are 4 standard sizes (Small, Medium, Large, Mobile) and an option for you to customize your own re-size. One can also replace the original or shrink your pictures.
It is a brilliant program that offers so much more functionality and best of all it works in Windows 10.