I dont think there's a limit in number. The practical limit is whether you can import a character to a campaign. If you are a free user, you can only export a character to one of the following: A campaign you are the GM of A campaign owned by someone who has a paid subscription (Plus or pro) A campaign based on an adventure module bought from the marketplace (like Curse of Strahd, etc). If you have a paid subscription, you can export your characters to any game.
