Hello there! i know a lot of you dont know how to make void worlds, so here in this tutorial im going to tell you all you need to know! lets get strait into it.

a void world / empty world / blank world is a world, with no blocks at all in it. its perfect for building massive redstone, or making a floating island.

1. The first thing you willl want to do, is go to "create new world" and type a world name, for example "void world".
   
2. change the game mode to creative
   
3. go to "more world options" and click the world type button, this will set it to superflat.
   
4. also, turn off "generate structures"
   
5. go to "customize">"presets" and on the top of the screen you will find a text box, with some weird text in it. you would want to edit the text like this:                                                                                                                                                                                                                                                                                                                                                                                     Before:3;minecraft:bedrock,2*minecraft:dirt,minecraft:grass;1;villageAfter:3;minecraft:air                                                                                                                                                                                              
   
6. go to "use preset">"done">"create new world"
   
7. when in the world, you will start falling, so double tap space to fly.
   
8. say this in chat: /tp @p 0 100 0
   
9. say this in chat: /setblock 0 99 0 stone
   
10. say this in chat: /setworldspawn
    

DONE!

now enjoy your void world! there is also a video tutorial above if you have trouble. thanks!