diff --git a/docs/formatting.md b/docs/formatting.md
index 03d9f62a..503cb84d 100644
--- a/docs/formatting.md
+++ b/docs/formatting.md
@@ -128,6 +128,12 @@ Conversion specifiers allow to *convert* the value to a different form or type.
     <td><code>{foo!n}</code></td>
     <td><code>7</code></td>
 </tr>
+<tr>
+    <td align="center"><code>W</code></td>
+    <td>Sanitize whitespace - Remove leading and trailing whitespace characters and replace <em>all</em> whitespace (sequences) with a single space <code> </code> character</td>
+    <td><code>{space!W}</code></td>
+    <td><code>Foo Bar</code></td>
+</tr>
 <tr>
     <td align="center"><code>t</code></td>
     <td>Trim a string, i.e. remove leading and trailing whitespace characters</td>
diff --git a/gallery_dl/formatter.py b/gallery_dl/formatter.py
index d3a532d4..34ede812 100644
--- a/gallery_dl/formatter.py
+++ b/gallery_dl/formatter.py
@@ -541,6 +541,7 @@ _CONVERSIONS = {
     "U": text.unescape,
     "H": lambda s: text.unescape(text.remove_html(s)),
     "g": text.slugify,
+    "W": text.sanitize_whitespace,
     "S": util.to_string,
     "s": str,
     "r": repr,
diff --git a/test/test_formatter.py b/test/test_formatter.py
index dc7c30a6..4a5a7abb 100644
--- a/test/test_formatter.py
+++ b/test/test_formatter.py
@@ -39,6 +39,7 @@ class TestFormatter(unittest.TestCase):
         ],
         "n": None,
         "s": " \n\r\tSPACE    ",
+        "S": " \n\r\tS  P         A\tC\nE    ",
         "h": "<p>foo </p> &amp; bar <p> </p>",
         "u": "&#x27;&lt; / &gt;&#x27;",
         "t": 1262304000,
@@ -61,6 +62,7 @@ class TestFormatter(unittest.TestCase):
         self._run_test("{a!c}", "Hello world")
         self._run_test("{a!C}", "Hello World")
         self._run_test("{s!t}", "SPACE")
+        self._run_test("{S!t}", "S  P         A\tC\nE")
         self._run_test("{a!U}", self.kwdict["a"])
         self._run_test("{u!U}", "'< / >'")
         self._run_test("{a!H}", self.kwdict["a"])
@@ -90,6 +92,8 @@ class TestFormatter(unittest.TestCase):
         self._run_test("{a!n}", 11)
         self._run_test("{l!n}", 3)
         self._run_test("{d!n}", 3)
+        self._run_test("{s!W}", "SPACE")
+        self._run_test("{S!W}", "S P A C E")
         self._run_test("{i_str!i}", 12345)
         self._run_test("{i_str!f}", 12345.0)
         self._run_test("{f_str!f}", 12.45)
@@ -549,10 +553,10 @@ def noarg():
             fmt4 = formatter.parse("\fM " + path + ":lengths")
 
         self.assertEqual(fmt1.format_map(self.kwdict), "'Title' by Name")
-        self.assertEqual(fmt2.format_map(self.kwdict), "142")
+        self.assertEqual(fmt2.format_map(self.kwdict), "168")
 
         self.assertEqual(fmt3.format_map(self.kwdict), "'Title' by Name")
-        self.assertEqual(fmt4.format_map(self.kwdict), "142")
+        self.assertEqual(fmt4.format_map(self.kwdict), "168")
 
         with self.assertRaises(TypeError):
             self.assertEqual(fmt0.format_map(self.kwdict), "")