diff --git a/Qrrapido - PageSpeed Insights.v2.pdf b/Qrrapido - PageSpeed Insights.v2.pdf
new file mode 100644
index 0000000..5accdaf
Binary files /dev/null and b/Qrrapido - PageSpeed Insights.v2.pdf differ
diff --git a/Views/Shared/_AdSpace.cshtml b/Views/Shared/_AdSpace.cshtml
index 43805fe..31a438d 100644
--- a/Views/Shared/_AdSpace.cshtml
+++ b/Views/Shared/_AdSpace.cshtml
@@ -60,8 +60,22 @@
             break;
     }
     
-    <script>
-        (adsbygoogle = window.adsbygoogle || []).push({});
+    <script defer>
+        // Lazy load AdSense to improve LCP
+        if ('IntersectionObserver' in window) {
+            const observer = new IntersectionObserver((entries) => {
+                entries.forEach(entry => {
+                    if (entry.isIntersecting) {
+                        (adsbygoogle = window.adsbygoogle || []).push({});
+                        observer.unobserve(entry.target);
+                    }
+                });
+            });
+            document.querySelectorAll('.adsbygoogle').forEach(ad => observer.observe(ad));
+        } else {
+            // Fallback for older browsers
+            (adsbygoogle = window.adsbygoogle || []).push({});
+        }
     </script>
 }
 else if (User.Identity.IsAuthenticated)
diff --git a/Views/Shared/_Layout.cshtml b/Views/Shared/_Layout.cshtml
index 42dc6a7..92d8753 100644
--- a/Views/Shared/_Layout.cshtml
+++ b/Views/Shared/_Layout.cshtml
@@ -10,6 +10,11 @@
     <meta name="viewport" content="width=device-width, initial-scale=1.0" />
     <title>@ViewData["Title"] - QR Rapido | Gerador QR Code Ultrarrápido</title>
 
+    <!-- Cache Control Headers -->
+    <meta http-equiv="Cache-Control" content="no-cache, no-store, must-revalidate">
+    <meta http-equiv="Pragma" content="no-cache">
+    <meta http-equiv="Expires" content="0">
+
     <!-- SEO Meta Tags -->
     <meta name="description" content="@Localizer["QRGenerateDescription"]">
     <meta name="keywords" content="qr rapido, gerador qr rapido, qr code rapido, codigo qr rapido, qr gratis rapido, generador qr rapido, qr ultrarapido">
@@ -40,9 +45,12 @@
     <meta name="twitter:description" content="@Localizer["QRGenerateDescription"]">
     <meta name="twitter:image" content="https://qrrapido.site/images/qrrapido-twitter-card.png">
 
-    <!-- Preload critical fonts -->
+    <!-- Preload critical resources for performance -->
     <link rel="preload" href="/webfonts/fa-solid-900.woff2" as="font" type="font/woff2" crossorigin>
     <link rel="preload" href="/webfonts/fa-brands-400.woff2" as="font" type="font/woff2" crossorigin>
+    <link rel="preload" href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" as="style">
+    <link rel="preload" href="~/css/app.min.css" as="style">
+    <link rel="preload" href="~/js/app.min.js" as="script">
 
     <!-- Structured Data Schema.org -->
     <script type="application/ld+json">
@@ -79,9 +87,9 @@
         }
     </script>
 
-    <!-- Google Analytics 4 -->
-    <script async src="https://www.googletagmanager.com/gtag/js?id=GA_MEASUREMENT_ID"></script>
-    <script>
+    <!-- Google Analytics 4 - Optimized with defer -->
+    <script defer src="https://www.googletagmanager.com/gtag/js?id=GA_MEASUREMENT_ID"></script>
+    <script defer>
         window.dataLayer = window.dataLayer || [];
         function gtag(){dataLayer.push(arguments);}
 
@@ -132,16 +140,16 @@
 
         var tagAdSense = $"https://pagead2.googlesyndication.com/pagead/js/adsbygoogle.js?client={ViewBag.AdSenseTag}";
         var adSenseScript = $"";
-        <!-- AdSense -->
-        <script async src='@tagAdSense' crossorigin='anonymous'></script>
+        <!-- AdSense - Optimized with defer and crossorigin -->
+        <script defer src='@tagAdSense' crossorigin='anonymous'></script>
     }
 
-    <!-- Bootstrap 5 -->
-    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet">
-    <link rel="stylesheet" href="~/css/vendor/fontawesome.min.css" asp-append-version="true" />
+    <!-- Bootstrap 5 - Optimized loading -->
+    <link href="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/css/bootstrap.min.css" rel="stylesheet" media="print" onload="this.media='all'">
+    <link rel="stylesheet" href="~/css/vendor/fontawesome.min.css" asp-append-version="true" media="print" onload="this.media='all'" />
 
-    <!-- Custom CSS -->
-    <link rel="stylesheet" href="~/css/app.min.css" asp-append-version="true" />
+    <!-- Custom CSS - Critical above fold with cache busting -->
+    <link rel="stylesheet" href="~/css/app.min.css?v=@DateTime.Now.Ticks" />
     
     <!-- Translation variables for JavaScript -->
     <script>
@@ -361,42 +369,11 @@
     <!-- Bootstrap 5 JS -->
     <script src="https://cdn.jsdelivr.net/npm/bootstrap@5.3.0/dist/js/bootstrap.bundle.min.js"></script>
     
-    <!-- Custom JS -->
-    <script src="~/js/app.min.js" asp-append-version="true" defer></script>
+    <!-- Custom JS with cache busting -->
+    <script src="~/js/app.min.js?v=@DateTime.Now.Ticks" defer></script>
 
-    <!-- Fallback inline script for debug -->
-    <script>
-    // Fallback inline para garantir funcionamento
-    document.addEventListener('DOMContentLoaded', function() {
-        // Fallback inline script starting
-        
-        const btn = document.getElementById('theme-toggle');
-        if (btn) {
-            // Theme toggle button found
-            btn.onclick = function() {
-                // Theme toggle clicked
-                const html = document.documentElement;
-                const current = html.getAttribute('data-theme') || 'light';
-                const newTheme = current === 'light' ? 'dark' : 'light';
-                html.setAttribute('data-theme', newTheme);
-                console.log('Theme changed to:', newTheme);
-                
-                const icon = document.getElementById('theme-icon');
-                const text = document.getElementById('theme-text');
-                if (icon) {
-                    icon.className = newTheme === 'dark' ? 'fas fa-moon' : 'fas fa-sun';
-                }
-                if (text) {
-                    text.textContent = newTheme === 'dark' ? 'Escuro' : 'Claro';
-                }
-            };
-            // Theme toggle configured inline
-        } else {
-            console.error('❌ Botão não encontrado pelo script inline!');
-        }
-
-    });
-    </script>
+    <!-- Performance optimizations moved to external file -->
+    <script src="~/js/performance-optimizations.js?v=@DateTime.Now.Ticks" defer></script>
     
     @await RenderSectionAsync("Scripts", required: false)
 </body>
diff --git a/wwwroot/js/performance-optimizations.js b/wwwroot/js/performance-optimizations.js
new file mode 100644
index 0000000..7785019
--- /dev/null
+++ b/wwwroot/js/performance-optimizations.js
@@ -0,0 +1,53 @@
+// QR Rapido - Performance Optimizations
+// Moved from inline scripts to improve LCP and reduce render-blocking
+
+// Fallback inline para garantir funcionamento do theme toggle
+document.addEventListener('DOMContentLoaded', function() {
+    // Theme toggle functionality
+    const btn = document.getElementById('theme-toggle');
+    if (btn) {
+        btn.onclick = function() {
+            const html = document.documentElement;
+            const current = html.getAttribute('data-theme') || 'light';
+            const newTheme = current === 'light' ? 'dark' : 'light';
+            html.setAttribute('data-theme', newTheme);
+
+            // Save preference to localStorage
+            localStorage.setItem('theme-preference', newTheme);
+
+            const icon = document.getElementById('theme-icon');
+            const text = document.getElementById('theme-text');
+            if (icon) {
+                icon.className = newTheme === 'dark' ? 'fas fa-moon' : 'fas fa-sun';
+            }
+            if (text) {
+                text.textContent = newTheme === 'dark' ? 'Escuro' : 'Claro';
+            }
+        };
+    }
+
+    // Load saved theme preference on page load
+    const savedTheme = localStorage.getItem('theme-preference');
+    if (savedTheme) {
+        document.documentElement.setAttribute('data-theme', savedTheme);
+        const icon = document.getElementById('theme-icon');
+        const text = document.getElementById('theme-text');
+        if (icon) {
+            icon.className = savedTheme === 'dark' ? 'fas fa-moon' : 'fas fa-sun';
+        }
+        if (text) {
+            text.textContent = savedTheme === 'dark' ? 'Escuro' : 'Claro';
+        }
+    }
+});
+
+// Optimize CSS loading fallback
+document.addEventListener('DOMContentLoaded', function() {
+    // Ensure non-critical CSS loads properly
+    const printLinks = document.querySelectorAll('link[media="print"]');
+    printLinks.forEach(link => {
+        if (link.onload === null) {
+            link.media = 'all';
+        }
+    });
+});
\ No newline at end of file