diff --git a/libraries/script-engine/src/ScriptManagerScriptingInterface.cpp b/libraries/script-engine/src/ScriptManagerScriptingInterface.cpp
index 8c2d2799f3..36da99b751 100644
--- a/libraries/script-engine/src/ScriptManagerScriptingInterface.cpp
+++ b/libraries/script-engine/src/ScriptManagerScriptingInterface.cpp
@@ -125,3 +125,11 @@ void ScriptManagerScriptingInterface::removeServerEntityScriptMessagesRequest(co
         _manager->engine()->raiseException("Uuid must not be specified when removeServerEntityScriptMessagesRequest is invoked from entity script");
     }
 }
+
+QString ScriptManagerScriptingInterface::btoa(const QByteArray &binary) {
+    return binary.toBase64();
+}
+
+QByteArray ScriptManagerScriptingInterface::atob(const QString &base64) {
+    return QByteArray::fromBase64(base64.toUtf8());
+}
diff --git a/libraries/script-engine/src/ScriptManagerScriptingInterface.h b/libraries/script-engine/src/ScriptManagerScriptingInterface.h
index c1d6bad360..d319cd30ae 100644
--- a/libraries/script-engine/src/ScriptManagerScriptingInterface.h
+++ b/libraries/script-engine/src/ScriptManagerScriptingInterface.h
@@ -581,6 +581,22 @@ public:
      Q_INVOKABLE void removeServerEntityScriptMessagesRequest();
      Q_INVOKABLE void removeServerEntityScriptMessagesRequest(const QUuid& entityID);
 
+     /*@jsdoc
+     * This decodes Base64 string and returns contents as ArrayBuffer.
+     * @function Script.atob
+     * @param {String} base64 - String with Base64-encoded binary data.
+     * @returns {ArrayBuffer} Decoded binary data.
+     */
+     Q_INVOKABLE QByteArray atob(const QString &base64);
+
+     /*@jsdoc
+     * This encodes ArrayBuffer and returns Base64-encoded string.
+     * @function Script.btoa
+     * @param {ArrayBuffer} binary - Data to be encoded.
+     * @returns {String} String with Base64-encoded binary data.
+     */
+     Q_INVOKABLE QString btoa(const QByteArray &binary);
+
  signals:
 
     /*@jsdoc
diff --git a/libraries/script-engine/src/v8/FastScriptValueUtils.cpp b/libraries/script-engine/src/v8/FastScriptValueUtils.cpp
index f111fe39d8..d1545e60cb 100644
--- a/libraries/script-engine/src/v8/FastScriptValueUtils.cpp
+++ b/libraries/script-engine/src/v8/FastScriptValueUtils.cpp
@@ -55,7 +55,7 @@ bool qBytearrayFromScriptValue(const ScriptValue& object, QByteArray &qByteArray
     if(!v8Value->IsArrayBuffer()) {
         return false;
     }
-    v8::Local<v8::ArrayBuffer> arrayBuffer;
+    v8::Local<v8::ArrayBuffer> arrayBuffer = v8::Local<v8::ArrayBuffer>::Cast(v8Value);
     qByteArray.resize(arrayBuffer->ByteLength());
     memcpy(qByteArray.data(), arrayBuffer->Data(), arrayBuffer->ByteLength());
     return true;