If you want to create quick and easy image banners for your Minecraft server I strongly suggest:
Minecraft Banner Maker Tool
It's free, easy to use, lots of customizations and most of all kicks with ANIMATED texts.
Took me 10 seconds to generate my first banner, now I seen it has a few more options to UPLAOD your own background, set font size and colors.
Really worth to give a try but may never replace a real custom design. Atleast it's free, image hosting also is included and TopG puts no branding on the generated banners.