Enter this in the console to save your voxel creations :D ...and then in the distant future some kind soul can work out how to import it so you can look at it again! (this was working with voxel.jit.su on ~2 March 2013)

Manual Voxel.js Export

myobj = []

crunch = {}

chunkCache = []


crunch.encode = function(chunk, cb) {
  var runs = [];
  var i = 0;
  while(i<chunk.length) {
    var v = chunk[i]
      , l = 0;
    while(i < chunk.length && chunk[i] === v) {
      ++i;
      ++l;
    }
    while(l >= 128) {
      runs.push(128 + (l&0x7f));
      l >>>= 7;
    }
    runs.push(l);
    runs.push(v);
  }
  return new Uint8Array(runs);
}

function sendInitialChunks(emitter) {
  Object.keys(game.voxels.chunks).map(function(chunkID) {
    var chunk = game.voxels.chunks[chunkID]
    var encoded = chunkCache[chunkID]
    if (!encoded) {
      encoded = crunch.encode(chunk.voxels)
      chunkCache[chunkID] = encoded
    }
    myobj.push(encoded)
  })
}


sendInitialChunks()


JSON.stringify(myobj)