diff --git a/qutebrowser/app.py b/qutebrowser/app.py
index f499f1be7..d2104e554 100644
--- a/qutebrowser/app.py
+++ b/qutebrowser/app.py
@@ -77,6 +77,7 @@ class QuteBrowser(QApplication):
             'scrollstart': self.mainwindow.tabs.scroll_start_act,
             'scrollend': self.mainwindow.tabs.scroll_end_act,
             'undo': self.mainwindow.tabs.undo_close,
+            'pyeval': self.pyeval
         }
 
         handler = handlers[cmd]
@@ -86,3 +87,14 @@ class QuteBrowser(QApplication):
             handler(*args, count=count)
         else:
             handler(*args)
+
+    def pyeval(self, s):
+        try:
+            r = eval(s)
+            out = repr(r)
+        except Exception as e:
+            out = ': '.join([e.__class__.__name__, str(e)])
+
+        tab = self.mainwindow.tabs.currentWidget()
+        tab.setContent(out.encode('UTF-8'), 'text/plain')
+
diff --git a/qutebrowser/commands/commands.py b/qutebrowser/commands/commands.py
index 808cc1621..412deca49 100644
--- a/qutebrowser/commands/commands.py
+++ b/qutebrowser/commands/commands.py
@@ -75,3 +75,7 @@ class ScrollStart(Command):
 class ScrollEnd(Command):
     nargs = 0
     key = 'G'
+
+class PyEval(Command):
+    nargs = 1
+    split_args = False