diff --git a/src/calibre/ebooks/conversion/plugins/docx_output.py b/src/calibre/ebooks/conversion/plugins/docx_output.py
index 5b40618e41..915b56dd55 100644
--- a/src/calibre/ebooks/conversion/plugins/docx_output.py
+++ b/src/calibre/ebooks/conversion/plugins/docx_output.py
@@ -6,7 +6,7 @@ from __future__ import (unicode_literals, division, absolute_import,
 __license__ = 'GPL v3'
 __copyright__ = '2013, Kovid Goyal <kovid at kovidgoyal.net>'
 
-from calibre.customize.conversion import OutputFormatPlugin
+from calibre.customize.conversion import OutputFormatPlugin, OptionRecommendation
 
 class DOCXOutput(OutputFormatPlugin):
 
@@ -14,10 +14,20 @@ class DOCXOutput(OutputFormatPlugin):
     author = 'Kovid Goyal'
     file_type = 'docx'
 
+    options = {
+        OptionRecommendation(name='extract_to',
+            help=_('Extract the contents of the generated %s file to the '
+                'specified directory. The contents of the directory are first '
+                'deleted, so be careful.') % 'DOCX'),
+    }
+
     def convert(self, oeb, output_path, input_plugin, opts, log):
         from calibre.ebooks.docx.writer.container import DOCX
         from calibre.ebooks.docx.writer.from_html import Convert
         docx = DOCX(opts, log)
         Convert(oeb, docx)()
         docx.write(output_path)
+        if opts.extract_to:
+            from calibre.ebooks.docx.dump import do_dump
+            do_dump(output_path, opts.extract_to)
 
diff --git a/src/calibre/ebooks/conversion/plugins/epub_output.py b/src/calibre/ebooks/conversion/plugins/epub_output.py
index 0fb0b69ce7..6569d069be 100644
--- a/src/calibre/ebooks/conversion/plugins/epub_output.py
+++ b/src/calibre/ebooks/conversion/plugins/epub_output.py
@@ -51,9 +51,9 @@ class EPUBOutput(OutputFormatPlugin):
 
     options = set([
         OptionRecommendation(name='extract_to',
-            help=_('Extract the contents of the generated EPUB file to the '
+            help=_('Extract the contents of the generated %s file to the '
                 'specified directory. The contents of the directory are first '
-                'deleted, so be careful.')),
+                'deleted, so be careful.') % 'EPUB'),
 
         OptionRecommendation(name='dont_split_on_page_breaks',
             recommended_value=False, level=OptionRecommendation.LOW,
diff --git a/src/calibre/ebooks/conversion/plugins/mobi_output.py b/src/calibre/ebooks/conversion/plugins/mobi_output.py
index afea62e2f3..c005ad4dd2 100644
--- a/src/calibre/ebooks/conversion/plugins/mobi_output.py
+++ b/src/calibre/ebooks/conversion/plugins/mobi_output.py
@@ -73,10 +73,10 @@ class MOBIOutput(OutputFormatPlugin):
             help=_('When adding the Table of Contents to the book, add it at the start of the '
                 'book instead of the end. Not recommended.')
         ),
-        OptionRecommendation(name='extract_to', recommended_value=None,
-            help=_('Extract the contents of the MOBI file to the'
-                ' specified directory. If the directory already '
-                'exists, it will be deleted.')
+        OptionRecommendation(name='extract_to',
+            help=_('Extract the contents of the generated %s file to the '
+                'specified directory. The contents of the directory are first '
+                'deleted, so be careful.') % 'MOBI'
         ),
         OptionRecommendation(name='share_not_sync', recommended_value=False,
             help=_('Enable sharing of book content via Facebook etc. '
@@ -286,11 +286,10 @@ class AZW3Output(OutputFormatPlugin):
             help=_('When adding the Table of Contents to the book, add it at the start of the '
                 'book instead of the end. Not recommended.')
         ),
-        OptionRecommendation(name='extract_to', recommended_value=None,
-            help=_('Extract the contents of the MOBI file to the'
-                ' specified directory. If the directory already '
-                'exists, it will be deleted.')
-        ),
+        OptionRecommendation(name='extract_to',
+            help=_('Extract the contents of the generated %s file to the '
+                'specified directory. The contents of the directory are first '
+                'deleted, so be careful.') % 'AZW3'),
         OptionRecommendation(name='share_not_sync', recommended_value=False,
             help=_('Enable sharing of book content via Facebook etc. '
                 ' on the Kindle. WARNING: Using this feature means that '
diff --git a/src/calibre/ebooks/docx/dump.py b/src/calibre/ebooks/docx/dump.py
index d5bda75405..f0699ef223 100644
--- a/src/calibre/ebooks/docx/dump.py
+++ b/src/calibre/ebooks/docx/dump.py
@@ -24,15 +24,18 @@ def pretty_all_xml_in_dir(path):
                     stream.truncate()
                     stream.write(etree.tostring(root, pretty_print=True, encoding='utf-8', xml_declaration=True))
 
-def dump(path):
-    dest = os.path.splitext(os.path.basename(path))[0]
-    dest += '-dumped'
+def do_dump(path, dest):
     if os.path.exists(dest):
         shutil.rmtree(dest)
     with ZipFile(path) as zf:
         zf.extractall(dest)
     pretty_all_xml_in_dir(dest)
 
+def dump(path):
+    dest = os.path.splitext(os.path.basename(path))[0]
+    dest += '-dumped'
+    do_dump(path, dest)
+
     print (path, 'dumped to', dest)
 
 if __name__ == '__main__':