diff --git a/src/i18n/en-US.properties b/src/i18n/en-US.properties
index d2493c78c1..d980eb8b39 100644
--- a/src/i18n/en-US.properties
+++ b/src/i18n/en-US.properties
@@ -56,6 +56,10 @@ find_previous=Find previous
 find_close=Close
 # Search input Aria-label attribute
 find_label=Search input
+# Sidebar thumbnails aria-label attribute
+thumbnail_label=Page thumbnails
+# Document preview aria-label attribute
+document_preview_label=Document preview
 
 # Error messages
 # Default preview error message
diff --git a/src/lib/viewers/doc/DocBaseViewer.js b/src/lib/viewers/doc/DocBaseViewer.js
index d2100e4fe7..d16e5d3c8c 100644
--- a/src/lib/viewers/doc/DocBaseViewer.js
+++ b/src/lib/viewers/doc/DocBaseViewer.js
@@ -162,13 +162,19 @@ class DocBaseViewer extends BaseViewer {
         this.startPageNum = this.getStartPage(this.startAt);
 
         if (this.options.enableThumbnailsSidebar) {
-            this.thumbnailsSidebarEl = document.createElement('div');
+            this.thumbnailsSidebarEl = document.createElement('nav');
             this.thumbnailsSidebarEl.className = `${CLASS_BOX_PREVIEW_THUMBNAILS_CONTAINER}`;
             this.thumbnailsSidebarEl.setAttribute('data-testid', 'thumbnails-sidebar');
+            this.thumbnailsSidebarEl.setAttribute('aria-label', __('thumbnail_label'));
             this.thumbnailsSidebarEl.tabIndex = 0;
             this.rootEl.insertBefore(this.thumbnailsSidebarEl, this.containerEl);
         }
 
+        if (this.containerEl) {
+            this.containerEl.setAttribute('aria-label', __('document_preview_label'));
+            this.containerEl.setAttribute('role', 'region');
+        }
+
         this.updateDiscoverabilityResinTag();
     }