Add site metadata

index.html

@@ -4,7 +4,13 @@
     <meta charset="UTF-8">
     <meta name="viewport" content="width=device-width, initial-scale=1.0">
     <title>QRDAMAGE.NET</title>
-    <meta name="description" content="Fast, offline, multi-format QR code generator.">
+
+    <meta name="description" content="Fast, client-side QR code generator.">
+    <meta property="og:type" content="website">
+    <meta property="og:url" content="https://qrdamage.net/">
+    <meta property="og:title" content="QR DAMAGE">
+    <meta property="og:description" content="Generate QR codes instantly in the browser.">
+
     <link rel="stylesheet" href="style.css">
     <link rel="icon" type="image/svg+xml" href="favicon.svg">
     <script src="qrcode.min.js"></script>

robots.txt

@@ -0,0 +1,5 @@
+User-agent: *
+Allow: /
+
+# If you create a sitemap later (see step 3), put the link here:
+Sitemap: https://qrdamage.net/sitemap.xml

sitemap.xml

@@ -0,0 +1,9 @@
+<?xml version="1.0" encoding="UTF-8"?>
+<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
+    <url>
+        <loc>https://qrdamage.net/</loc>
+        <lastmod>2025-12-19</lastmod>
+        <changefreq>monthly</changefreq>
+        <priority>1.0</priority>
+    </url>
+</urlset>