diff --git a/fire/core.py b/fire/core.py
index 14eed638..916e06ac 100644
--- a/fire/core.py
+++ b/fire/core.py
@@ -305,7 +305,7 @@ def _OneLineResult(result):
 
   try:
     # Don't force conversion to ascii.
-    return json.dumps(result, ensure_ascii=False)
+    return json.dumps(result, ensure_ascii=False, indent=4, sort_keys=True, default=str).encode('utf8')
   except (TypeError, ValueError):
     return str(result).replace('\n', ' ')