NBT Tracker

This mod adds an tooltip displaying the size of an item's nbt tag to help identify problematic nbt heavy items such as backpacks and shulker boxes.

In Minecraft, having more than 2MB of data in a single server -> client packet such as inventory syncing will cause the client to disconnect from dedicated servers and be unable to join with a message similar to below.

Note: this mod is clientside only and will do nothing on a server.