1.16.5 |verified|: Mcedit

Use if you want the classic "MCEdit" experience outside the game.

First, let’s address the elephant in the room. If you download the classic (the last official stable release) and point it at a Minecraft 1.16.5 world, you will encounter immediate issues: mcedit 1.16.5

is an unofficial, community-driven fork of the original software. It was updated specifically to handle Minecraft 1.13 through 1.16.5. This version patches the block registry, fixes the rendering engine for new biomes, and allows stable loading of Nether Update worlds. Use if you want the classic "MCEdit" experience

Since 1.16.5 worlds are more complex than older versions, follow these steps before using any external editor: mcedit 1.16.5