diff --git a/ImageBase64Encoder/app/src/main/java/com/kosalgeek/android/imagebase64encoder/ImageBase64.java b/ImageBase64Encoder/app/src/main/java/com/kosalgeek/android/imagebase64encoder/ImageBase64.java
index 559eb14..fb7a8d8 100644
--- a/ImageBase64Encoder/app/src/main/java/com/kosalgeek/android/imagebase64encoder/ImageBase64.java
+++ b/ImageBase64Encoder/app/src/main/java/com/kosalgeek/android/imagebase64encoder/ImageBase64.java
@@ -112,7 +112,7 @@ public String encodeFile(String filePath) throws FileNotFoundException {
     private String encodeImageToString(Bitmap bitmap){
         ByteArrayOutputStream bao = new ByteArrayOutputStream();
         int quality = 100; //100: compress nothing
-        bitmap.compress(Bitmap.CompressFormat.JPEG, quality, bao);
+        bitmap.compress(Bitmap.CompressFormat.PNG, quality, bao);
 
         if(bitmap != null){//important! prevent out of memory
             bitmap.recycle();