Press Win+R, then type %appdata%\.minecraft, then press Ok.
In the Finder, from the Go menu, select ‘Go to Folder’, then type: ~/Library/Application Support/minecraft, and click Go.
~ is your home directory, usually /home/YOURNAME, so ~/.minecraft would be /home/YOURNAME/.minecraft/.
Where is my Minecraft world saved?
Saved worlds are stored in different locations depending on the operating system. It is currently possible to select where the .minecraft data folder, and thus the saved worlds folder. It can be accessed by pressing Windows+R then typing %appdata%\.minecraft.
Where are Minecraft worlds saved Android?
Open the “My Files” application and open the >games>com.mojang>minecraftWorlds-folder. Each folder on this location contains one Minecraft World. The advantage of Android, over iOS, is the possibility to create a backup of a single world.