What Is NBT?
NBT is the file format Minecraft uses to store most of its data. Region files, player data files, etc are all NBT files.
If you would like to make edits to these files you'll need to use an NBT editor. Our panel has a built-in editor, but if you're looking for something a bit more advanced, you can download on here:https://www.minecraftforum.net/forums/mapping-and-modding-java-edition/minecraft-tools/1262665-nbtexplorer-nbt-editor-for-windows-and-mac (opens in a new tab)
There are also ones you can use in-game, here: https://www.curseforge.com/minecraft/mc-mods/nbt-editor/files (opens in a new tab)