diff --git a/python/polycube_encoder.py b/python/polycube_encoder.py
new file mode 100644
index 0000000..ef390ef
--- /dev/null
+++ b/python/polycube_encoder.py
@@ -0,0 +1,9 @@
+from json import JSONEncoder
+from typing import Any
+from polycube import PolyCube
+
+class PolyCubeEncdoder(JSONEncoder):
+    def default(self, o: Any) -> Any:
+        if isinstance(o, PolyCube):
+            return list(o.cubes)
+        return super().default(o)