diff --git a/web/web_callback_test/index.html b/web/web_callback_test/index.html
new file mode 100644
index 0000000..8ee4315
--- /dev/null
+++ b/web/web_callback_test/index.html
@@ -0,0 +1,21 @@
+<!DOCTYPE html>
+<html lang="en">
+<head>
+    <meta charset="UTF-8">
+    <meta name="viewport" content="width=device-width, initial-scale=1.0">
+    <title>Document</title>
+    <script src="../common/telegram.js"></script>
+</head>
+<body style="filter: invert(1)">
+    <h1>/web_callback_test</h1>
+    <textarea id="data" style="width: 100%; height: 200px"></textarea>
+    <button style="font-size: 20px;" onclick="sendData()">Send Data</button>
+    <script> 
+    const tg = window.Telegram.WebApp
+    const sendData = () => {
+        tg.sendData(document.getElementById('data').value)
+
+    } 
+    </script>
+</body>
+</html>
\ No newline at end of file
