By only using modern web browsers without any plugins (read Firefox and Chrome), you can now load and explore your own Minecraft world using a web app called Blockplot. You can also modify the world as you desire by adding and moving around cute little blocks. However I don’t see any options to choose different block style and navigation feels a bit clunky. Blockplot is powered by voxel.js which is an open source 3D voxel game building toolkit for modern web browsers.

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