diff --git a/favicon.svg b/favicon.svg
new file mode 100644
index 0000000..dc179f6
--- /dev/null
+++ b/favicon.svg
@@ -0,0 +1,9 @@
+<svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 64 64">
+  <rect width="64" height="64" rx="14" fill="#111"/>
+  <rect x="10" y="10" width="44" height="44" rx="6" fill="#fff"/>
+  <g fill="#111">
+    <path d="M15 15h12v12H15zM37 15h12v12H37zM15 37h12v12H15z"/>
+    <path d="M18 18h6v6h-6zM40 18h6v6h-6zM18 40h6v6h-6z" fill="#fff"/>
+    <path d="M31 15h3v3h-3zM31 21h3v6h-3zM31 31h6v3h-6zM40 31h3v3h-3zM46 31h3v6h-3zM31 37h3v3h-3zM37 37h9v3h-9zM31 43h6v3h-6zM43 43h3v6h-3zM49 43h3v3h-3zM31 49h9v3h-9z"/>
+  </g>
+</svg>
diff --git a/index.php b/index.php
index bc4894d..0fcc0af 100644
--- a/index.php
+++ b/index.php
@@ -514,6 +514,7 @@ header('Content-Type: text/html; charset=utf-8');
   <meta charset="utf-8">
   <meta name="viewport" content="width=device-width, initial-scale=1">
   <title><?= h($title) ?> QR</title>
+  <link rel="icon" href="favicon.svg" type="image/svg+xml">
   <style>
     :root { color-scheme: light dark; font-family: system-ui, sans-serif; }
     body { margin: 0; min-height: 100vh; display: grid; place-items: center; background: #f5f5f5; color: #111; }