Make a photo square online - batch and free

Tutorial video

YouTube Tutorial video

Also try the following services:

Batch resize an image. Stretch the image to a specified size or cut out an area
Resize photo to 512 x 512 pixels online - batch and free | Resize photo to 600 x 600 pixels online - batch and free | Make a photo square online - batch and free | Resize photo to 256 x 256 pixels online - batch and free | Resize images to 10 x 15 format - batch and free