diff --git a/README.md b/README.md
index a26a488..fff52fb 100644
--- a/README.md
+++ b/README.md
@@ -146,6 +146,7 @@ args = [
 [format]
 window_format = '{urgency_start}<b>“{title}”</b>{urgency_end} — <i>{app_name}</i> on workspace {workspace_name}   <span alpha="20000">({id})</span>'
 workspace_format = '<b>Workspace {name}</b>   <span alpha="20000">({id})</span>'
+html_escape = true
 urgency_start = '<span background="darkred" foreground="yellow">'
 urgency_end = '</span>'
 icon_dirs = [
@@ -154,7 +155,7 @@ icon_dirs = [
     '/usr/share/icons/hicolor/48x48/apps',
     '/usr/share/pixmaps',
 ]
-fallback_icon = '/usr/share/icons/gnome/48x48/apps/kwin.png'
+fallback_icon = '/usr/share/pixmaps/archlinux-logo.png'
 ```
 
 In the `[menu]` section, you can specify the menu program using the
@@ -169,16 +170,19 @@ to style the text using HTML and CSS.  The following formats are supported
 right now.
 * `window_format` defines how windows are displayed.  The placeholder `{title}`
   is replaced with the window's title, `{app_name}` with the application name,
-  `{app_icon}` with the application's icon (a path to a PNG or SVG file),
-  `{workspace_name}` with the name or number of the workspace the window is
-  shown, and `{id}` is the window's sway-internal con id.  There are also the
-  placeholders `{urcency_start}` and `{urgency_end}` which get replaced by the
-  empty string if the window has no urgency flag, and with the values of the
-  same-named formats if the window has the urgency flag set.  That makes it
-  possible to highlight urgent windows as shown in the default config.
+  `{marks}` with a comma-separated list of the window's marks, `{app_icon}`
+  with the application's icon (a path to a PNG or SVG file), `{workspace_name}`
+  with the name or number of the workspace the window is shown, and `{id}` is
+  the window's sway-internal con id.  There are also the placeholders
+  `{urcency_start}` and `{urgency_end}` which get replaced by the empty string
+  if the window has no urgency flag, and with the values of the same-named
+  formats if the window has the urgency flag set.  That makes it possible to
+  highlight urgent windows as shown in the default config.
 * `workspace_format` defines how workspaces are displayed.  There are the
   placeholders `{name}` which gets replaced by the workspace's number or name,
   and `{id}` which gets replaced by the sway-internal con id of the workspace.
+* `html_escape` defines if the strings replacing the placeholders above (except
+  for `{urgency_start}` and `{urgency_end}`) should be HTML-escaped.
 * `urgency_start` is a string which replaces the `{urgency_start}` placeholder
   in `window_format`.
 * `urgency_end` is a string which replaces the `{urgency_end}` placeholder in
diff --git a/src/con.rs b/src/con.rs
index 5651b06..5d9a8ae 100644
--- a/src/con.rs
+++ b/src/con.rs
@@ -198,6 +198,14 @@ lazy_static! {
         regex::Regex::new("(.+)(-[0-9.]+)").unwrap();
 }
 
+fn maybe_html_escape(do_it: bool, text: &str) -> String {
+    if do_it {
+        text.replace("<", "&lt;").replace(">", "&gt;")
+    } else {
+        text.to_string()
+    }
+}
+
 impl<'a> DisplayFormat for Window<'a> {
     fn format_for_display(&self, cfg: &cfg::Config) -> String {
         let default_format = cfg::Format::default();
@@ -216,6 +224,11 @@ impl<'a> DisplayFormat for Window<'a> {
             .as_ref()
             .and_then(|f| f.urgency_end.as_ref())
             .unwrap_or_else(|| default_format.urgency_end.as_ref().unwrap());
+        let html_escape = cfg
+            .format
+            .as_ref()
+            .and_then(|f| f.html_escape)
+            .unwrap_or_else(|| default_format.html_escape.unwrap());
         let icon_dirs = cfg
             .format
             .as_ref()
@@ -247,10 +260,20 @@ impl<'a> DisplayFormat for Window<'a> {
                     ""
                 },
             )
-            .replace("{app_name}", self.get_app_name())
+            .replace(
+                "{app_name}",
+                &maybe_html_escape(html_escape, self.get_app_name()),
+            )
             .replace(
                 "{workspace_name}",
-                self.workspace.name.as_ref().unwrap().as_str(),
+                &maybe_html_escape(
+                    html_escape,
+                    self.workspace.name.as_ref().unwrap().as_str(),
+                ),
+            )
+            .replace(
+                "{marks}",
+                &maybe_html_escape(html_escape, &self.node.marks.join(", ")),
             )
             .replace(
                 "{app_icon}",
@@ -266,7 +289,10 @@ impl<'a> DisplayFormat for Window<'a> {
                     .unwrap_or_else(String::new)
                     .as_str(),
             )
-            .replace("{title}", self.get_title())
+            .replace(
+                "{title}",
+                &maybe_html_escape(html_escape, self.get_title()),
+            )
     }
 }
 
@@ -462,8 +488,13 @@ impl<'a> DisplayFormat for Workspace<'a> {
             .unwrap_or_else(|| {
                 default_format.workspace_format.as_ref().unwrap()
             });
+        let html_escape = cfg
+            .format
+            .as_ref()
+            .and_then(|f| f.html_escape)
+            .unwrap_or_else(|| default_format.html_escape.unwrap());
 
         fmt.replace("{id}", format!("{}", self.get_id()).as_str())
-            .replace("{name}", self.get_name())
+            .replace("{name}", &maybe_html_escape(html_escape, self.get_name()))
     }
 }
diff --git a/src/config.rs b/src/config.rs
index e8c101a..f33d521 100644
--- a/src/config.rs
+++ b/src/config.rs
@@ -42,6 +42,7 @@ pub struct Format {
     pub workspace_format: Option<String>,
     pub urgency_start: Option<String>,
     pub urgency_end: Option<String>,
+    pub html_escape: Option<bool>,
     pub icon_dirs: Option<Vec<String>>,
     pub fallback_icon: Option<String>,
 }
@@ -99,6 +100,7 @@ impl Default for Format {
                  <span alpha=\"20000\">({id})</span>"
                     .to_string(),
             ),
+            html_escape: Some(true),
             urgency_start: Some(
                 "<span background=\"darkred\" foreground=\"yellow\">"
                     .to_string(),