diff --git a/docs/access-map-viewer/index.html b/docs/access-map-viewer/index.html
index 38d1b40..e658dcf 100644
--- a/docs/access-map-viewer/index.html
+++ b/docs/access-map-viewer/index.html
@@ -119,6 +119,15 @@
       border-left: 1px solid rgba(255, 255, 255, 0.25);
     }
 
+    .info-banner {
+      background: var(--surface);
+      border-bottom: 1px solid var(--border);
+      color: var(--text-muted);
+      text-align: center;
+      padding: 10px 16px;
+      font-size: 13px;
+    }
+
     .page {
       max-width: 1600px;
       margin: 24px auto;
@@ -631,6 +640,8 @@
     </div>
   </header>
 
+  <div class="info-banner">Client-Side Only. No data is uploaded anywhere.</div>
+
   <main class="page">
     <section id="upload-section" class="panel" style="max-width: 640px; margin: 0 auto;">
       <div class="panel__header">