Minecraft Data Merge Block Command Generator

Replacing a block resets its data; /data merge block edits the block entity that is already there — a spawner delay, a chest Lock tag, sign text — keyed by exact coordinates. Compose the NBT payload here and point it at the right position.

• Merge NBT into an existing block entity without replacing the block
• Exact x y z block targeting
• Works on chests, spawners, signs, furnaces and other block entities