Im gonna need a lot of help

ok so im making a level editor called FLOW and want to give users the abillity to share there levels with level codes. Ive been dreading this daunting task and was wondering if anyone knew how or had any advice.

You need online multiplayer thing do you have a free account?

(P.S i have a free account to

yes I have a free account but I dont understand why I would need online multiplayer for this.

Because if its online people from different places then can share like how mario maker is online