diff --git a/assets/graphicarts/log-out.svg b/assets/graphicarts/log-out.svg
new file mode 100644
index 0000000..c9002c9
--- /dev/null
+++ b/assets/graphicarts/log-out.svg
@@ -0,0 +1 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="currentColor" stroke-width="2" stroke-linecap="round" stroke-linejoin="round" class="feather feather-log-out"><path d="M9 21H5a2 2 0 0 1-2-2V5a2 2 0 0 1 2-2h4"></path><polyline points="16 17 21 12 16 7"></polyline><line x1="21" y1="12" x2="9" y2="12"></line></svg>
\ No newline at end of file
diff --git a/assets/index.html b/assets/index.html
index c59b78a..338f803 100644
--- a/assets/index.html
+++ b/assets/index.html
@@ -94,6 +94,11 @@
                         <span class="icon mr-1">{% inline "upload.svg" %}</span>
                         Export
                     </b-dropdown-item>
+                    <b-dropdown-divider v-if="authenticated"></b-dropdown-divider>
+                    <b-dropdown-item-button v-if="authenticated">
+                        <span class="icon mr-1">{% inline "log-out.svg" %}</span>
+                        Log out
+                    </b-dropdown-item-button>
                 </b-dropdown>
             </div>
             <div class="p-2 overflow-auto border-top flex-grow-1">
diff --git a/assets/javascripts/app.js b/assets/javascripts/app.js
index fad8b5b..a6d4626 100644
--- a/assets/javascripts/app.js
+++ b/assets/javascripts/app.js
@@ -2,6 +2,11 @@
 
 var TITLE = document.title
 
+function authenticated() {
+  return /auth=.+/g.test(document.cookie)
+
+}
+
 var FONTS = [
   "Arial",
   "Courier New",
@@ -171,6 +176,7 @@ var vm = new Vue({
         'size': 1,
       },
       'refreshRate': undefined,
+      'authenticated': authenticated(),
     }
   },
   computed: {