MCEdit Filter to convert PC worlds to PE. Note: This does NOT convert the world to MCRegion format.

PC2PE.py

displayName = "PC -> PE"

replaceBlocks = {
    119: 0, # End portal frame
    122: 0, # Dragon egg
    125: 157, # Double wooden slab
    126: 158, # Wooden slab
    130: 54, # Enderchest
    137: 0, # Command block
    138: 0, # Beacon
    160: 102, # Stained glass panes
    166: 0, # Barrier
    168: 0, # Prismarine
    169: 0, # Sea lantern
}

def perform(level, box, options):
    for x in xrange(box.minx, box.maxx):
        for y in xrange(box.miny, box.maxy):
            for z in xrange(box.minz, box.maxz):
                blockid = level.blockAt(x, y, z)
                try:
                    newid = replaceBlocks[blockid]
                except IndexError:
                    pass
                else:
                    level.setBlockAt(x, y, z, newid)
    return;