diff --git a/.gitmodules b/.gitmodules
new file mode 100644
index 0000000..89a1e20
--- /dev/null
+++ b/.gitmodules
@@ -0,0 +1,3 @@
+[submodule "Tools/sb3tosb2"]
+	path = Tools/sb3tosb2
+	url = https://github.com/RexScratch/sb3tosb2
diff --git a/Tools/sb3tosb2 b/Tools/sb3tosb2
new file mode 160000
index 0000000..69d05b4
--- /dev/null
+++ b/Tools/sb3tosb2
@@ -0,0 +1 @@
+Subproject commit 69d05b4b82f8e8e632bb86ca715ade6f7cee38b3