diff --git a/weboob/tools/application/formatters/json.py b/weboob/tools/application/formatters/json.py
new file mode 100644
index 00000000..f7354a89
--- /dev/null
+++ b/weboob/tools/application/formatters/json.py
@@ -0,0 +1,42 @@
+# -*- coding: utf-8 -*-
+
+# Copyright(C) 2013 Julien Hebert
+#
+# This file is part of weboob.
+#
+# weboob is free software: you can redistribute it and/or modify
+# it under the terms of the GNU Affero General Public License as published by
+# the Free Software Foundation, either version 3 of the License, or
+# (at your option) any later version.
+#
+# weboob is distributed in the hope that it will be useful,
+# but WITHOUT ANY WARRANTY; without even the implied warranty of
+# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+# GNU Affero General Public License for more details.
+#
+# You should have received a copy of the GNU Affero General Public License
+# along with weboob. If not, see <http://www.gnu.org/licenses/>.
+
+
+from .iformatter import IFormatter
+from weboob.tools.json import json
+__all__ = ['JsonFormatter']
+
+class Encoder(json.JSONEncoder):
+    "generic weboob objects encoder"
+    def default(self, obj):
+        try :
+            return json.JSONEncoder.default(self, obj)
+        except TypeError:
+            i = IFormatter()
+            try :
+                dico = i.to_dict(obj)
+            except TypeError:
+                return str(obj)
+            for z in dico:
+                return z
+
+
+class JsonFormatter(IFormatter):
+    def format_dict(self, item):
+        return json.dumps(item, cls=Encoder)
diff --git a/weboob/tools/application/formatters/load.py b/weboob/tools/application/formatters/load.py
index 05aacb7d..3bc544ab 100644
--- a/weboob/tools/application/formatters/load.py
+++ b/weboob/tools/application/formatters/load.py
@@ -25,7 +25,7 @@ class FormatterLoadError(Exception):
     pass
 
 class FormattersLoader(object):
-    BUILTINS = ['htmltable', 'multiline', 'simple', 'table', 'csv', 'webkit']
+    BUILTINS = ['htmltable', 'multiline', 'simple', 'table', 'csv', 'webkit', 'json']
 
     def __init__(self):
         self.formatters = {}
@@ -71,3 +71,6 @@ class FormattersLoader(object):
         elif name == 'csv':
             from .csv import CSVFormatter
             return CSVFormatter
+        elif name == 'json':
+            from .json import JsonFormatter
+            return JsonFormatter