diff --git a/index.html b/index.html
index 3530265..da2b833 100644
--- a/index.html
+++ b/index.html
@@ -11,11 +11,31 @@
       content="default-src 'self'; script-src 'self'; style-src 'self' 'unsafe-inline'; img-src 'self' data: blob:; connect-src 'self'; worker-src 'self' blob:; object-src 'none'; base-uri 'self'; form-action 'none'"
     />
     <title>Cave Survey Viewer</title>
+    <link rel="icon" type="image/png" sizes="96x96" href="/favicon-96x96.png" />
     <link rel="icon" type="image/png" href="/favicon.png" />
+    <meta name="application-name" content="Cave Survey Viewer" />
     <meta
       name="description"
       content="A web-native 3D viewer for cave survey data. Runs entirely in your browser — nothing is uploaded."
     />
+    <!-- Open Graph: gives search engines an explicit site name (otherwise Google
+         falls back to the pages.dev domain and labels the result "Cloudflare"). -->
+    <meta property="og:site_name" content="Cave Survey Viewer" />
+    <meta property="og:title" content="Cave Survey Viewer" />
+    <meta
+      property="og:description"
+      content="A web-native 3D viewer for cave survey data. Runs entirely in your browser — nothing is uploaded."
+    />
+    <meta property="og:type" content="website" />
+    <meta property="og:url" content="https://caveviewer.pages.dev/" />
+    <script type="application/ld+json">
+      {
+        "@context": "https://schema.org",
+        "@type": "WebSite",
+        "name": "Cave Survey Viewer",
+        "url": "https://caveviewer.pages.dev/"
+      }
+    </script>
   </head>
   <body>
     <div id="app">
diff --git a/public/favicon-96x96.png b/public/favicon-96x96.png
new file mode 100644
index 0000000..c4bb6e0
Binary files /dev/null and b/public/favicon-96x96.png differ
