diff --git a/index.html b/index.html
index 9215c97..eff8f0e 100644
--- a/index.html
+++ b/index.html
@@ -126,7 +126,6 @@
 // lex.opacity = 1
 
 </script>
-<script src="js/ext/dataUriToBlob.js"></script>
 <script src="js/ext/oktween.js"></script>
 
 <script src="js/util.js"></script>
diff --git a/js/ext/dataUriToBlob.js b/js/ext/dataUriToBlob.js
deleted file mode 100644
index 80189b8..0000000
--- a/js/ext/dataUriToBlob.js
+++ /dev/null
@@ -1,58 +0,0 @@
-var dataUriToUint8Array = function(uri){
-  var data = uri.split(',')[1];
-  var bytes = atob(data);
-  var buf = new ArrayBuffer(bytes.length);
-  var u8 = new Uint8Array(buf);
-  for (var i = 0; i < bytes.length; i++) {
-    u8[i] = bytes.charCodeAt(i);
-  }
-  return u8 
-}
-
-window.dataUriToBlob = (function(){
-/**
- * Blob constructor.
- */
-
-var Blob = window.Blob;
-
-/**
- * ArrayBufferView support.
- */
-
-var hasArrayBufferView = new Blob([new Uint8Array(100)]).size == 100;
-
-/**
- * Return a `Blob` for the given data `uri`.
- *
- * @param {String} uri
- * @return {Blob}
- * @api public
- */
-
-var dataUriToBlob = function(uri){
-  var data = uri.split(',')[1];
-  var bytes = atob(data);
-  var buf = new ArrayBuffer(bytes.length);
-  var arr = new Uint8Array(buf);
-  for (var i = 0; i < bytes.length; i++) {
-    arr[i] = bytes.charCodeAt(i);
-  }
-
-  if (!hasArrayBufferView) arr = buf;
-  var blob = new Blob([arr], { type: mime(uri) });
-  blob.slice = blob.slice || blob.webkitSlice;
-  return blob;
-};
-
-/**
- * Return data uri mime type.
- */
-
-function mime(uri) {
-  return uri.split(';')[0].slice(5);
-}
-
-return dataUriToBlob;
-
-})()