diff --git a/comfy_extras/nodes_preview_any.py b/comfy_extras/nodes_preview_any.py
index e6805696f..e749fa6ae 100644
--- a/comfy_extras/nodes_preview_any.py
+++ b/comfy_extras/nodes_preview_any.py
@@ -25,7 +25,7 @@ class PreviewAny():
             value = str(source)
         elif source is not None:
             try:
-                value = json.dumps(source)
+                value = json.dumps(source, indent=4)
             except Exception:
                 try:
                     value = str(source)