Canva is actually pretty amazing for what you can do for free. They charge money for the really nice elements for design but the free ones are ok. What is outstanding about it is the ability to create videos. It will size everything perfectly. One problem is the constant bugs in the program and they move menu items around. Not intuitive. As others have said, be careful when using their stock images or music. I put a song from Canva on a video and Instagram pulled it off.
