Wand Of Translocation

Players craft the wand from two iron ingots and one ender pearl. Placing a stored chest or barrel with a right-click puts it down like a normal chest, and nearby chests merge with it as usual. Shift plus right-click on a placed chest merges it with the others around it, so a storage block can be rearranged without emptying it first.

The wand keeps its contents as data components on the item, so stored chests and barrels survive logging out. Wands can even be put inside chests, which allows a chest to store a chest that holds a wand, a recursive setup. The mod is a remake of a utility first released in 2012, updated for 1.21.4 with Fabric API as its one required dependency. Client and server both need it, and the source code is published under the CC0 1.0 Universal license, which places the work in the public domain.

Moving inventories with any mod carries an inherent risk. The author has tested the mod thoroughly and reports no data loss, but says the mod is used at the player's own risk, so backing up a world before rearranging large storage is sensible.