diff --git a/keyserver/src/responders/landing-handler.js b/keyserver/src/responders/landing-handler.js
--- a/keyserver/src/responders/landing-handler.js
+++ b/keyserver/src/responders/landing-handler.js
@@ -198,6 +198,14 @@
         <base href="${basePath}" />
         ${fontsInclude}
         ${cssInclude}
+        <script>
+          localStorage.clear();
+          indexedDB.databases().then(databases => {
+            databases.forEach(db => {
+              indexedDB.deleteDatabase(db.name);
+            });
+          });
+        </script>
         <link
           rel="apple-touch-icon"
           sizes="180x180"
diff --git a/landing/script.js b/landing/script.js
--- a/landing/script.js
+++ b/landing/script.js
@@ -1,7 +1,5 @@
 // @flow
 
-localStorage.clear();
-
 import 'isomorphic-fetch';
 
 import invariant from 'invariant';