How to change format of an image [closed]

Currently I am displaying images to google sheets using a url. For example http://cube.rider.biz/visualcube.php?fmt=svg&size=200&alg=S2M2E2. However I want to change the format of the image to jpg in order to reduce the memory consumption. It there a tool that will allow me to do this. I am looking for a website which will take the original image and change the format. Then I will display the url of the new image on the google sheet. Thank you