diff --git a/index.php b/index.php
index 2c752341c..733074d79 100644
--- a/index.php
+++ b/index.php
@@ -14,6 +14,7 @@ require __DIR__ . '/common.php';
 $page_cfg['load_tpl_vars'] = [
     'post_icons'
 ];
+$page_cfg['canonical_link'] = true;
 
 // Show last topic
 $show_last_topic = true;
diff --git a/library/includes/functions.php b/library/includes/functions.php
index 67256eb1f..2f0764ed1 100644
--- a/library/includes/functions.php
+++ b/library/includes/functions.php
@@ -2236,3 +2236,43 @@ function infoByIP(string $ipAddress, int $port = 0): array
 
     return $data;
 }
+
+/**
+ * Generates canonical url
+ *
+ * @return string
+ */
+function getCanonicalUrl(): string
+{
+    $fullUrl = rtrim(FULL_URL, '/');
+    $script = $_SERVER['SCRIPT_NAME'];
+
+    $allowedParams = [
+        POST_CAT_URL,
+        POST_FORUM_URL,
+        POST_GROUPS_URL,
+        POST_POST_URL,
+        POST_TOPIC_URL,
+        POST_USERS_URL,
+        'sort',
+        'start',
+        'order'
+    ];
+
+    $params = [];
+    foreach ($allowedParams as $key) {
+        if (isset($_GET[$key])) {
+            $params[$key] = $_GET[$key];
+        }
+    }
+
+    if (!empty($params)) {
+        ksort($params);
+        $queryString = http_build_query($params, '', '&', PHP_QUERY_RFC3986);
+        $url = $fullUrl . $script . "?$queryString";
+    } else {
+        $url = $fullUrl . $script;
+    }
+
+    return htmlCHR($url);
+}
diff --git a/library/includes/page_header.php b/library/includes/page_header.php
index f2f22581b..0c715ddaa 100644
--- a/library/includes/page_header.php
+++ b/library/includes/page_header.php
@@ -123,6 +123,9 @@ $template->assign_vars([
 
     'USE_TABLESORTER' => !empty($page_cfg['use_tablesorter']),
     'ALLOW_ROBOTS' => !$bb_cfg['board_disable'] && (!isset($page_cfg['allow_robots']) || $page_cfg['allow_robots'] === true),
+    'META_CANONICAL' => (isset($page_cfg['canonical_link']) && $page_cfg['canonical_link'] === true)
+        ? getCanonicalUrl()
+        : ((isset($page_cfg['canonical_link']) && is_string($page_cfg['canonical_link'])) ? $page_cfg['canonical_link'] : false),
     'META_DESCRIPTION' => $page_cfg['meta_description'] ?? '',
 
     'SITENAME' => $bb_cfg['sitename'],
diff --git a/styles/templates/default/page_header.tpl b/styles/templates/default/page_header.tpl
index 0ec5fb8f5..5216225dd 100644
--- a/styles/templates/default/page_header.tpl
+++ b/styles/templates/default/page_header.tpl
@@ -25,6 +25,9 @@
 <!-- ELSE -->
 <meta name="robots" content="none">
 <!-- ENDIF -->
+<!-- IF META_CANONICAL -->
+<link rel="canonical" href="{META_CANONICAL}"/>
+<!-- ENDIF -->
 <!-- IF META_PREV_PAGE -->
 <link rel="prev" href="{META_PREV_PAGE}">
 <!-- ENDIF / META_PREV_PAGE -->
diff --git a/viewforum.php b/viewforum.php
index 7a1cdb4a3..17b962e9e 100644
--- a/viewforum.php
+++ b/viewforum.php
@@ -12,6 +12,7 @@ define('BB_SCRIPT', 'forum');
 require __DIR__ . '/common.php';
 
 $page_cfg['include_bbcode_js'] = true;
+$page_cfg['canonical_link'] = true;
 
 $show_last_topic = true;
 $last_topic_max_len = 40;
diff --git a/viewtopic.php b/viewtopic.php
index f952e0f15..e71470904 100644
--- a/viewtopic.php
+++ b/viewtopic.php
@@ -22,6 +22,7 @@ $page_cfg['load_tpl_vars'] = [
     'post_icons',
     'topic_icons'
 ];
+$page_cfg['canonical_link'] = true;
 
 $newest = $next_topic_id = 0;
 $start = isset($_GET['start']) ? abs((int)$_GET['start']) : 0;