Compressing base64 data uri images

Maybe string compression is the solution for you. This converts the data to byte arrays.

There are multiple implementations and algorithms around, for instance

• LZMA-JS A standalone JavaScript implementation of the Lempel-Ziv-Markov chain (LZMA) compression algorithm.

  my_lzma = new LZMA("./lzma_worker.js");
  my_lzma.compress("This is my compression test.", 1, function on_compress_complete(result) {
      console.log("Compressed: " + result);
      my_lzma.decompress(result, function on_decompress_complete(result) {
          console.log("Decompressed: " + result);
      }, function on_decompress_progress_update(percent) {
          console.log("Decompressing: " + (percent * 100) + "%");
      });
  }, function on_compress_progress_update(percent) {
      console.log("Compressing: " + (percent * 100) + "%");
  });
  

• lz-string: JavaScript compression, fast!

  var str = "This is my compression test.";
  console.log("Size of sample is: " + str.length);
  var compressed = LZString.compress(str);
  console.log("Size of compressed sample is: " + compressed.length);
  str = LZString.decompress(compressed);
  console.log("Sample is: " + str);