MCEdit: World Editor for Minecraft

MCEdit is a saved game editor for Minecraft. Since Minecraft saved games contain every single element of the world the player is playing in, it has much more in common with 3D world, map, and terrain editors than traditional saved game editors. MCEdit has been developed since 2010 with the original goal of allowing Classic levels to be played in the full version of Minecraft, but has since evolved into a full featured editor and is currently undergoing a thorough rewrite for version 2.0.
MCEdit is a third party utility and is not affiliated with Minecraft, Mojang AB, or Microsoft Inc.

MCEdit 2.0 Technology Demo

Comments

A demo of technologies used in MCEdit 2.0 is available for download from the links to the left.

Note that this is a very early version of the software. There are bugs everywhere and most of the important features are missing. Do not use this version for any serious work. Don't bother reporting any bugs either, I already know about them. (Actually, you can report if the app doesn't even open, as long as you attach your mcedit.log file in a pastebin or something)