Will I lose my progress when I create a Minecraft account?

I've been playing Minecraft without an account, but figured it'd be useful when I start playing multiplayer.
I only have singleplayer survival worlds: will they be affected if I make an account?

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1 Answer

No, they will not be affected. Survival worlds are stored locally (on your computer) in the saves folder. When you create an account, your worlds will not be affected by this.

Just in case, you can always create back-ups of the worlds in question. To do this, please see this article.