diff --git a/frontend/index.html b/frontend/index.html
index 8416ba8..0bc44bf 100644
--- a/frontend/index.html
+++ b/frontend/index.html
@@ -3,6 +3,7 @@
   <head>
     <meta charset="UTF-8" />
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
+    <link rel="icon" type="image/svg+xml" href="/src/favicon.svg" />
     <title>Codex Helper</title>
   </head>
   <body>
diff --git a/frontend/src/favicon.svg b/frontend/src/favicon.svg
new file mode 100644
index 0000000..493c2ba
--- /dev/null
+++ b/frontend/src/favicon.svg
@@ -0,0 +1,3 @@
+<svg xmlns="http://www.w3.org/2000/svg" width="24" height="24" viewBox="0 0 24 24" fill="none" stroke="#25bfd5" stroke-width="2" stroke-linecap="round" stroke-linejoin="round">
+  <path d="M4 14a1 1 0 0 1-.78-1.63l9.9-10.2a.5.5 0 0 1 .86.46l-1.92 6.02A1 1 0 0 0 13 10h7a1 1 0 0 1 .78 1.63l-9.9 10.2a.5.5 0 0 1-.86-.46l1.92-6.02A1 1 0 0 0 11 14z" />
+</svg>