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 100 x 100 pixels online - batch and free | Resize photo to 128 x 128 pixels online - batch and free | Resize photo to 64 x 64 pixels online - batch and free | Reduce photos online - batch and free | Resize photo to 1400 x 1400 pixels online - batch and free