Did you know that you can resize a batch of pictures in Windows 10? It is really easy.
Step 1
Navigate to the folder with the images. Select (highlight) the pictures you want to resize.
Step 2
Right click and select “Resize pictures.”

Step 3
A window will appear asking what size you would like all your pictures to be. For most websites, the medium size will work well. Click Resize.

All done!