diff --git a/index.php b/index.php
index 23259a8..94e16e8 100644
--- a/index.php
+++ b/index.php
@@ -95,7 +95,7 @@ Router\post_action('login', function() {
 
 Router\get_action('show', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
 
     Response\html(Template\layout('read_item', array(
         'item' => Model\get_item($id)
@@ -105,7 +105,7 @@ Router\get_action('show', function() {
 
 Router\get_action('read', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     $item = Model\get_item($id);
     $nav = Model\get_nav_item($item); // must be placed before set_item_read()
 
@@ -120,7 +120,7 @@ Router\get_action('read', function() {
 
 Router\get_action('mark-item-read', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     Model\set_item_read($id);
     Response\Redirect('?action=default');
 });
@@ -128,7 +128,7 @@ Router\get_action('mark-item-read', function() {
 
 Router\get_action('mark-item-unread', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     Model\set_item_unread($id);
     Response\Redirect('?action=history');
 });
@@ -136,7 +136,7 @@ Router\get_action('mark-item-unread', function() {
 
 Router\get_action('mark-item-removed', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     Model\set_item_removed($id);
     Response\Redirect('?action=history');
 });
@@ -144,7 +144,7 @@ Router\get_action('mark-item-removed', function() {
 
 Router\post_action('mark-item-read', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     Model\set_item_read($id);
     Response\json(array('Ok'));
 });
@@ -152,7 +152,7 @@ Router\post_action('mark-item-read', function() {
 
 Router\post_action('mark-item-unread', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
     Model\set_item_unread($id);
     Response\json(array('Ok'));
 });
@@ -160,7 +160,7 @@ Router\post_action('mark-item-unread', function() {
 
 Router\post_action('change-item-status', function() {
 
-    $id = Request\param('id');
+    $id = Model\decode_item_id(Request\param('id'));
 
     Response\json(array(
         'item_id' => urlencode($id),
@@ -182,7 +182,7 @@ Router\get_action('confirm-remove', function() {
 
     $id = Request\int_param('feed_id');
 
-    Response\html(Template\layout('confirm_remove', array(
+    Response\html(Template\layout('confirm_remove_feed', array(
         'feed' => Model\get_feed($id),
         'menu' => 'feeds'
     )));
@@ -241,7 +241,7 @@ Router\get_action('mark-as-read', function() {
 
 Router\get_action('confirm-flush-history', function() {
 
-    Response\html(Template\layout('confirm_flush', array(
+    Response\html(Template\layout('confirm_flush_items', array(
         'menu' => 'history'
     )));
 });
diff --git a/model.php b/model.php
index 7c374f3..a9ea1b1 100644
--- a/model.php
+++ b/model.php
@@ -42,6 +42,18 @@ function get_autoflush_options()
 }
 
 
+function encode_item_id($input)
+{
+    return strtr(base64_encode($input), '+/=', '-_,');
+}
+
+
+function decode_item_id($input)
+{
+    return base64_decode(strtr($input, '-_,', '+/='));
+}
+
+
 function export_feeds()
 {
     $opml = new Export(get_feeds());
diff --git a/templates/history.php b/templates/history.php
index 41637b5..ae12234 100644
--- a/templates/history.php
+++ b/templates/history.php
@@ -13,11 +13,12 @@
 
     <section class="items" id="listing">
     <?php foreach ($items as $item): ?>
-        <article id="item-<?= urlencode($item['id']) ?>" data-item-id="<?= urlencode($item['id']) ?>">
+        <?php $item_id = Model\encode_item_id($item['id']) ?>
+        <article id="item-<?= $item_id ?>" data-item-id="<?= $item_id ?>">
             <h2>
                 <a
-                    href="?action=show&amp;id=<?= urlencode($item['id']) ?>"
-                    id="open-<?= urlencode($item['id']) ?>"
+                    href="?action=show&amp;id=<?= $item_id ?>"
+                    id="open-<?= $item_id ?>"
                 >
                     <?= Helper\escape($item['title']) ?>
                 </a>
@@ -25,14 +26,14 @@
             <p>
                 <?= Helper\get_host_from_url($item['url']) ?> |
                 <?= dt('%A %e %B %Y %k:%M', $item['updated']) ?> |
-                <a href="?action=mark-item-unread&amp;id=<?= urlencode($item['id']) ?>"><?= t('mark as unread') ?></a> |
-                <a href="?action=mark-item-removed&amp;id=<?= urlencode($item['id']) ?>"><?= t('remove') ?></a> |
+                <a href="?action=mark-item-unread&amp;id=<?= $item_id ?>"><?= t('mark as unread') ?></a> |
+                <a href="?action=mark-item-removed&amp;id=<?= $item_id ?>"><?= t('remove') ?></a> |
                 <a
                     href="<?= $item['url'] ?>"
-                    id="original-<?= urlencode($item['id']) ?>"
+                    id="original-<?= $item_id ?>"
                     rel="noreferrer"
                     target="_blank"
-                    data-item-id="<?= urlencode($item['id']) ?>"
+                    data-item-id="<?= $item_id ?>"
                 >
                     <?= t('original link') ?>
                 </a>
diff --git a/templates/read_item.php b/templates/read_item.php
index e097335..6baa5a6 100644
--- a/templates/read_item.php
+++ b/templates/read_item.php
@@ -3,7 +3,7 @@
     <p class="alert alert-info"><?= t('Item not found') ?></p>
 
 <?php else: ?>
-    <article class="item" id="current-item" data-item-id="<?= urlencode($item['id']) ?>">
+    <article class="item" id="current-item" data-item-id="<?= Model\encode_item_id($item['id']) ?>">
         <h1>
             <a href="<?= $item['url'] ?>" rel="noreferrer" target="_blank" id="original-item"><?= Helper\escape($item['title']) ?></a>
         </h1>
@@ -19,7 +19,7 @@
         <nav>
             <span class="nav-left">
                 <?php if ($item_nav['previous']): ?>
-                    <a href="?action=read&amp;id=<?= urlencode($item_nav['previous']['id']) ?>" id="previous-item">« <?= t('Previous') ?></a>
+                    <a href="?action=read&amp;id=<?= Model\encode_item_id($item_nav['previous']['id']) ?>" id="previous-item">« <?= t('Previous') ?></a>
                 <?php else: ?>
                     « <?= t('Previous') ?>
                 <?php endif ?>
@@ -27,11 +27,11 @@
 
             <span class="nav-middle">
                 <?php if ($item_nav['previous'] && $item_nav['next']): ?>
-                    <a href="?action=default#item-<?= urlencode($item_nav['next']['id']) ?>"><?= t('Unread items') ?></a>
+                    <a href="?action=default#item-<?= Model\encode_item_id($item_nav['next']['id']) ?>"><?= t('Unread items') ?></a>
                 <?php elseif ($item_nav['previous'] && ! $item_nav['next']): ?>
-                    <a href="?action=default#item-<?= urlencode($item_nav['previous']['id']) ?>"><?= t('Unread items') ?></a>
+                    <a href="?action=default#item-<?= Model\encode_item_id($item_nav['previous']['id']) ?>"><?= t('Unread items') ?></a>
                 <?php elseif (! $item_nav['previous'] && $item_nav['next']): ?>
-                    <a href="?action=default#item-<?= urlencode($item_nav['next']['id']) ?>"><?= t('Unread items') ?></a>
+                    <a href="?action=default#item-<?= Model\encode_item_id($item_nav['next']['id']) ?>"><?= t('Unread items') ?></a>
                 <?php elseif (! $item_nav['previous'] && ! $item_nav['next']): ?>
                     <a href="?action=default"><?= t('Unread items') ?></a>
                 <?php endif ?>
@@ -39,7 +39,7 @@
 
             <span class="nav-right">
                 <?php if ($item_nav['next']): ?>
-                    <a href="?action=read&amp;id=<?= urlencode($item_nav['next']['id']) ?>" id="next-item"><?= t('Next') ?> »</a>
+                    <a href="?action=read&amp;id=<?= Model\encode_item_id($item_nav['next']['id']) ?>" id="next-item"><?= t('Next') ?> »</a>
                 <?php else: ?>
                     <?= t('Next') ?> »
                 <?php endif ?>
diff --git a/templates/unread_items.php b/templates/unread_items.php
index dc50a83..71c0a35 100644
--- a/templates/unread_items.php
+++ b/templates/unread_items.php
@@ -13,11 +13,12 @@
 
     <section class="items" id="listing">
     <?php foreach ($items as $item): ?>
-        <article id="item-<?= urlencode($item['id']) ?>" data-item-id="<?= urlencode($item['id']) ?>">
+        <?php $item_id = Model\encode_item_id($item['id']) ?>
+        <article id="item-<?= $item_id ?>" data-item-id="<?= $item_id ?>">
             <h2>
                 <a
-                    href="?action=read&amp;id=<?= urlencode($item['id']) ?>"
-                    id="open-<?= urlencode($item['id']) ?>"
+                    href="?action=read&amp;id=<?= $item_id ?>"
+                    id="open-<?= $item_id ?>"
                 >
                     <?= Helper\escape($item['title']) ?>
                 </a>
@@ -27,13 +28,13 @@
             </p>
             <p>
                 <?= Helper\get_host_from_url($item['url']) ?> |
-                <a href="?action=mark-item-read&amp;id=<?= urlencode($item['id']) ?>"><?= t('mark as read') ?></a> |
+                <a href="?action=mark-item-read&amp;id=<?= $item_id ?>"><?= t('mark as read') ?></a> |
                 <a
                     href="<?= $item['url'] ?>"
-                    id="original-<?= urlencode($item['id']) ?>"
+                    id="original-<?= $item_id ?>"
                     rel="noreferrer"
                     target="_blank"
-                    data-item-id="<?= urlencode($item['id']) ?>"
+                    data-item-id="<?= $item_id ?>"
                     data-action="mark-read"
                 >
                     <?= t('original link') ?>