Is there Minecraft hack that you can see what's in chests without opening them?

Is there Minecraft hack that you can see what's in chests without opening them?

Des is in Spectator Mode.

At the latest when you write one there's one

After all, more helpful than the answer of the miner19981

This works in spectator mode, but only if the box has already been opened.
In principle, you open it anyway, but no one sees.