This is how you easily and quickly can duplicate items in Minecraft Beta without the use of any editors, I found this out accidentally when my save got corrupted and when I restored my “level_dat” I got more stuff.
The level dat only contains your characters inventory and location, nothing else (I think or correct me if Im wrong)
To find your save file on a pc, type this in:
For windows 7
C:UsersYour Windows Account Name HereAppDataRoaming.minecraftsaves
And windows Xp/Vista…