diff --git a/sb2toswf/index.html b/sb2toswf/index.html
index c5f6ae33..d9a9fb57 100644
--- a/sb2toswf/index.html
+++ b/sb2toswf/index.html
@@ -1,2 +1,4 @@
 <script src="https://unpkg.com/@ruffle-rs/ruffle"></script>
-<embed src="Converter.swf" width="100%" height="100%"></embed>
\ No newline at end of file
+<center>
+<embed src="Converter.swf" width="800" height="800"></embed>
+</center>
\ No newline at end of file