: Place the items you want to duplicate inside a bundle . Put that bundle into one of the hoppers while the machine is off.
This is currently the most widely used "all-item" dupe. It requires a specific redstone machine that moves items rapidly between two hoppers. 1 Redstone Comparator ~8 Redstone Dust 1 Bundle (to hold the items you want to dupe) How to Perform It: duplication-glitch-minecraft-bedrock
While the hopper method is the "gold standard" for reliability, other niche exploits exist: : Place the items you want to duplicate inside a bundle