how to resize my photos on ad!?

HELP!?
im constantly having to delete photos on previous ads because my photo size is HUGE.. not only is it annoying to have to keep deleting photos from recent ads but my photos are just WAY to big on my ads. help please?!

Do you want to use a computer or your phone?

Melchorseg/Photographer
Http://www.instagram.com/melchorseg

If you want to use a computer, and that computer is Windows, here is a free editor.

http://www.irfanview.com/

https://youtu.be/Uh4DJOE7Oo0

Here is a free and easy tool that specializes in resizing images and converting their formats.

PIXResizer

i couldnt find my post to see your replies! lol. I use both pretty often.. computer is a chromebook(so no windows) and then i use my iphone