diff --git a/std/string/null2array.lb b/std/string/null2array.lb
new file mode 100644
index 0000000..e825e83
--- /dev/null
+++ b/std/string/null2array.lb
@@ -0,0 +1,10 @@
+@ 0
+ args 1
+ dup
+ jz 1
+ jmp 0
+
+@ 1
+ pop
+ size
+ quit