diff --git a/src/ui/MainWindow.py b/src/ui/MainWindow.py
index 6715618..36f7522 100644
--- a/src/ui/MainWindow.py
+++ b/src/ui/MainWindow.py
@@ -949,15 +949,20 @@ class MainWindow(QMainWindow):
 
                 menu.addSeparator()
 
-                # Transformations-Aktionen
+                # Transformations-Aktionen (nur aktiv wenn XML-Dateien vorhanden)
+                xsl_file_obj = item.data(0, Qt.ItemDataRole.UserRole) if item else None
+                has_xml_files = bool(xsl_file_obj and xsl_file_obj.xmls)
+
                 action_transform = QAction("Alle XML-Dateien transformieren", self)
                 action_transform.setIcon(QIcon(QIcon.fromTheme("system-run")))
                 action_transform.triggered.connect(lambda: self._transform_xsl_file(item))
+                action_transform.setEnabled(has_xml_files)
                 menu.addAction(action_transform)
 
                 action_transform_force = QAction("Alle XML-Dateien neu transformieren (force)", self)
                 action_transform_force.setIcon(QIcon(QIcon.fromTheme("view-refresh")))
                 action_transform_force.triggered.connect(lambda: self._transform_xsl_file(item, force=True))
+                action_transform_force.setEnabled(has_xml_files)
                 menu.addAction(action_transform_force)
 
                 menu.addSeparator()