There are many free tools you can use to remove the background from an image for free, but many background removers don't erase the correct part of the image or they give you a low resolution copy of the image with a transparent background. Here are 3 tools you can use to remove the background of a picture for free.

Canva Pro 45day free trial: https://thefigco.com/canva
Erase.bg: https://www.erase.bg
Adobe Express Background Remover: https://express.adobe.com/tools/remov...

Options from previous video
Remove.bg: https://www.remove.bg
Pixlr: https://pixlr.com/removebackground