diff --git a/downloads.php b/downloads.php
index fed2d9110..519bbe1f7 100644
--- a/downloads.php
+++ b/downloads.php
@@ -99,14 +99,43 @@ $versions = [
     'default' => 'OS default version',
 ];
 
+
+$platform = $_SERVER['HTTP_SEC_CH_UA_PLATFORM'] ?? '';
+$ua = $_SERVER['HTTP_USER_AGENT'] ?? '';
+$auto_os = null;
+$auto_osvariant = null;
+
+if (!empty($platform) || !empty($ua)) {
+    $platform = strtolower(trim($platform, '"'));
+    if ($platform === 'windows' || stripos($ua, 'Windows') !== false) {
+        $auto_os = 'windows';
+    } elseif ($platform === 'macos' || stripos($ua, 'Mac') !== false) {
+        $auto_os = 'osx';
+    } elseif ($platform === 'linux' || stripos($ua, 'Linux') !== false) {
+        $auto_os = 'linux';
+        if (stripos($ua, 'Ubuntu') !== false) {
+            $auto_osvariant = 'linux-ubuntu';
+        } elseif (stripos($ua, 'Debian') !== false) {
+            $auto_osvariant = 'linux-debian';
+        } elseif (stripos($ua, 'Fedora') !== false) {
+            $auto_osvariant = 'linux-fedora';
+        } elseif (stripos($ua, 'Red Hat') !== false || stripos($ua, 'RedHat') !== false) {
+            $auto_osvariant = 'linux-redhat';
+        }
+    }
+}
+
 $defaults = [
-    'os' => 'linux',
+    'os' => $auto_os ?? 'linux',
     'version' => 'default',
     'usage' => 'web',
 ];
 
 $options = array_merge($defaults, $_GET);
-if (!array_key_exists('osvariant', $options) || !array_key_exists($options['osvariant'], $os[$options['os']]['variants'])) {
+
+if ($auto_osvariant && (!array_key_exists('osvariant', $options) || !array_key_exists($options['osvariant'], $os[$options['os']]['variants']))) {
+    $options['osvariant'] = $auto_osvariant;
+} elseif (!array_key_exists('osvariant', $options) || !array_key_exists($options['osvariant'], $os[$options['os']]['variants'])) {
     $options['osvariant'] = array_key_first($os[$options['os']]['variants']);
 }
 ?>