diff --git a/surfsense_web/app/dashboard/[search_space_id]/documents/(manage)/components/DocumentsTableShell.tsx b/surfsense_web/app/dashboard/[search_space_id]/documents/(manage)/components/DocumentsTableShell.tsx
index b32ad0ddf..68d971fc4 100644
--- a/surfsense_web/app/dashboard/[search_space_id]/documents/(manage)/components/DocumentsTableShell.tsx
+++ b/surfsense_web/app/dashboard/[search_space_id]/documents/(manage)/components/DocumentsTableShell.tsx
@@ -38,7 +38,6 @@ import {
 import { Avatar, AvatarFallback, AvatarImage } from "@/components/ui/avatar";
 import { Button } from "@/components/ui/button";
 import { Checkbox } from "@/components/ui/checkbox";
-import { Dialog, DialogContent, DialogHeader, DialogTitle } from "@/components/ui/dialog";
 import {
 	Drawer,
 	DrawerContent,
@@ -234,6 +233,7 @@ export function DocumentsTableShell({
 	mentionedDocIds,
 	onToggleChatMention,
 	isSearchMode = false,
+	onOpenInTab,
 }: {
 	documents: Document[];
 	loading: boolean;
@@ -253,6 +253,8 @@ export function DocumentsTableShell({
 	onToggleChatMention?: (doc: Document, mentioned: boolean) => void;
 	/** Whether results are filtered by a search query or type filters */
 	isSearchMode?: boolean;
+	/** When provided, desktop "Preview" opens a document tab instead of the popup dialog */
+	onOpenInTab?: (doc: Document) => void;
 }) {
 	const t = useTranslations("documents");
 	const { openDialog } = useDocumentUploadDialog();
@@ -742,9 +744,9 @@ export function DocumentsTableShell({
 																</button>
 															</DropdownMenuTrigger>
 															<DropdownMenuContent align="end" className="w-48">
-																<DropdownMenuItem onClick={() => handleViewDocument(doc)}>
+																<DropdownMenuItem onClick={() => onOpenInTab ? onOpenInTab(doc) : handleViewDocument(doc)}>
 																	<Eye className="h-4 w-4" />
-																	Preview
+																	Open
 																</DropdownMenuItem>
 																{isEditable && (
 																	<DropdownMenuItem
@@ -923,26 +925,18 @@ export function DocumentsTableShell({
 				</div>
 			)}
 
-			{/* Document Content Viewer */}
-			<Dialog open={!!viewingDoc} onOpenChange={(open) => !open && handleCloseViewer()}>
-				<DialogContent className="max-w-4xl max-w-[92%] md:max-w-4xl max-h-[75vh] md:max-h-[80vh] flex flex-col overflow-hidden pb-0 p-3 md:p-6 gap-2 md:gap-4">
-					<DialogHeader className="flex-shrink-0">
-						<DialogTitle className="text-sm md:text-lg leading-tight pr-6">
+			{/* Document Content Viewer (mobile drawer) */}
+			<Drawer open={!!viewingDoc} onOpenChange={(open) => !open && handleCloseViewer()}>
+				<DrawerContent className="max-h-[85vh] flex flex-col">
+					<DrawerHandle />
+					<DrawerHeader className="text-left shrink-0">
+						<DrawerTitle className="text-base leading-tight break-words">
 							{viewingDoc?.title}
-						</DialogTitle>
-					</DialogHeader>
+						</DrawerTitle>
+					</DrawerHeader>
 					<div
 						onScroll={handlePreviewScroll}
-						className={[
-							"overflow-y-auto flex-1 min-h-0 px-1 md:px-6 select-text",
-							"max-md:text-xs",
-							"max-md:[&_h1]:text-base! max-md:[&_h1]:mt-3!",
-							"max-md:[&_h2]:text-sm! max-md:[&_h2]:mt-2!",
-							"max-md:[&_h3]:text-xs! max-md:[&_h3]:mt-2!",
-							"max-md:[&_h4]:text-xs!",
-							"max-md:[&_td]:text-[11px]! max-md:[&_td]:px-2! max-md:[&_td]:py-1.5!",
-							"max-md:[&_th]:text-[11px]! max-md:[&_th]:px-2! max-md:[&_th]:py-1.5!",
-						].join(" ")}
+						className="overflow-y-auto flex-1 min-h-0 px-4 pb-6 select-text text-xs [&_h1]:text-base! [&_h1]:mt-3! [&_h2]:text-sm! [&_h2]:mt-2! [&_h3]:text-xs! [&_h3]:mt-2! [&_h4]:text-xs! [&_td]:text-[11px]! [&_td]:px-2! [&_td]:py-1.5! [&_th]:text-[11px]! [&_th]:px-2! [&_th]:py-1.5!"
 						style={{
 							maskImage: `linear-gradient(to bottom, ${previewScrollPos === "top" ? "black" : "transparent"}, black 16px, black calc(100% - 16px), ${previewScrollPos === "bottom" ? "black" : "transparent"})`,
 							WebkitMaskImage: `linear-gradient(to bottom, ${previewScrollPos === "top" ? "black" : "transparent"}, black 16px, black calc(100% - 16px), ${previewScrollPos === "bottom" ? "black" : "transparent"})`,
@@ -956,8 +950,8 @@ export function DocumentsTableShell({
 							<MarkdownViewer content={viewingContent} />
 						)}
 					</div>
-				</DialogContent>
-			</Dialog>
+				</DrawerContent>
+			</Drawer>
 
 			{/* Document Metadata Viewer (Ctrl+Click) */}
 			<JsonMetadataViewer
@@ -1027,7 +1021,7 @@ export function DocumentsTableShell({
 							}}
 						>
 							<Eye className="h-4 w-4" />
-							Preview
+							Open
 						</Button>
 						{mobileActionDoc &&
 							EDITABLE_DOCUMENT_TYPES.includes(
diff --git a/surfsense_web/components/documents/DocumentNode.tsx b/surfsense_web/components/documents/DocumentNode.tsx
index da488a199..64b98cdc2 100644
--- a/surfsense_web/components/documents/DocumentNode.tsx
+++ b/surfsense_web/components/documents/DocumentNode.tsx
@@ -203,7 +203,7 @@ export const DocumentNode = React.memo(function DocumentNode({
 								<MoreHorizontal className="h-3.5 w-3.5" />
 							</Button>
 						</DropdownMenuTrigger>
-						<DropdownMenuContent align="end" className="w-40">
+						<DropdownMenuContent align="end" className="w-40" onClick={(e) => e.stopPropagation()}>
 							<DropdownMenuItem onClick={() => onPreview(doc)}>
 								<Eye className="mr-2 h-4 w-4" />
 								Open
@@ -243,7 +243,7 @@ export const DocumentNode = React.memo(function DocumentNode({
 			</ContextMenuTrigger>
 
 			{contextMenuOpen && (
-				<ContextMenuContent className="w-40">
+				<ContextMenuContent className="w-40" onClick={(e) => e.stopPropagation()}>
 					<ContextMenuItem onClick={() => onPreview(doc)}>
 						<Eye className="mr-2 h-4 w-4" />
 						Open
diff --git a/surfsense_web/components/editor-panel/editor-panel.tsx b/surfsense_web/components/editor-panel/editor-panel.tsx
index 7530a1d80..f2f66eb48 100644
--- a/surfsense_web/components/editor-panel/editor-panel.tsx
+++ b/surfsense_web/components/editor-panel/editor-panel.tsx
@@ -255,7 +255,7 @@ function MobileEditorDrawer() {
 			shouldScaleBackground={false}
 		>
 			<DrawerContent
-				className="h-[95vh] max-h-[95vh] z-80 bg-sidebar overflow-hidden"
+				className="h-[90vh] max-h-[90vh] z-80 bg-sidebar overflow-hidden"
 				overlayClassName="z-80"
 			>
 				<DrawerHandle />
diff --git a/surfsense_web/components/hitl-edit-panel/hitl-edit-panel.tsx b/surfsense_web/components/hitl-edit-panel/hitl-edit-panel.tsx
index e8bc1a6cd..a75752217 100644
--- a/surfsense_web/components/hitl-edit-panel/hitl-edit-panel.tsx
+++ b/surfsense_web/components/hitl-edit-panel/hitl-edit-panel.tsx
@@ -355,7 +355,7 @@ function MobileHitlEditDrawer() {
 			shouldScaleBackground={false}
 		>
 			<DrawerContent
-				className="h-[95vh] max-h-[95vh] z-80 bg-sidebar overflow-hidden"
+				className="h-[90vh] max-h-[90vh] z-80 bg-sidebar overflow-hidden"
 				overlayClassName="z-80"
 			>
 				<DrawerHandle />
diff --git a/surfsense_web/components/layout/ui/sidebar/DocumentsSidebar.tsx b/surfsense_web/components/layout/ui/sidebar/DocumentsSidebar.tsx
index 0baf403a9..460121f22 100644
--- a/surfsense_web/components/layout/ui/sidebar/DocumentsSidebar.tsx
+++ b/surfsense_web/components/layout/ui/sidebar/DocumentsSidebar.tsx
@@ -7,6 +7,7 @@ import { useParams } from "next/navigation";
 import { useTranslations } from "next-intl";
 import { useCallback, useEffect, useMemo, useRef, useState } from "react";
 import { toast } from "sonner";
+import { MarkdownViewer } from "@/components/markdown-viewer";
 import { EXPORT_FILE_EXTENSIONS } from "@/components/shared/ExportMenuItems";
 import { DocumentsFilters } from "@/app/dashboard/[search_space_id]/documents/(manage)/components/DocumentsFilters";
 import {
@@ -27,6 +28,14 @@ import { FolderPickerDialog } from "@/components/documents/FolderPickerDialog";
 import { FolderTreeView } from "@/components/documents/FolderTreeView";
 import { Avatar, AvatarFallback, AvatarGroup } from "@/components/ui/avatar";
 import { Button } from "@/components/ui/button";
+import {
+	Drawer,
+	DrawerContent,
+	DrawerHandle,
+	DrawerHeader,
+	DrawerTitle,
+} from "@/components/ui/drawer";
+import { Spinner } from "@/components/ui/spinner";
 import { Tooltip, TooltipContent, TooltipTrigger } from "@/components/ui/tooltip";
 import { getConnectorIcon } from "@/contracts/enums/connectorIcons";
 import type { DocumentTypeEnum } from "@/contracts/types/document.types";
@@ -34,7 +43,9 @@ import { useDebouncedValue } from "@/hooks/use-debounced-value";
 import { useDocumentSearch } from "@/hooks/use-document-search";
 import { useDocuments } from "@/hooks/use-documents";
 import { useMediaQuery } from "@/hooks/use-media-query";
+import { useIsMobile } from "@/hooks/use-mobile";
 import { foldersApiService } from "@/lib/apis/folders-api.service";
+import { documentsApiService } from "@/lib/apis/documents-api.service";
 import { authenticatedFetch } from "@/lib/auth-utils";
 import { queries } from "@/zero/queries/index";
 import { SidebarSlideOutPanel } from "./SidebarSlideOutPanel";
@@ -81,6 +92,8 @@ export function DocumentsSidebar({
 	const { data: connectors } = useAtomValue(connectorsAtom);
 	const connectorCount = connectors?.length ?? 0;
 
+	const isMobileLayout = useIsMobile();
+
 	const [search, setSearch] = useState("");
 	const debouncedSearch = useDebouncedValue(search, 250);
 	const [activeTypes, setActiveTypes] = useState<DocumentTypeEnum[]>([]);
@@ -333,6 +346,31 @@ export function DocumentsSidebar({
 		[]
 	);
 
+	// Document popup viewer state (for tree view "Open" and mobile preview)
+	const [viewingDoc, setViewingDoc] = useState<DocumentNodeDoc | null>(null);
+	const [viewingContent, setViewingContent] = useState<string>("");
+	const [viewingLoading, setViewingLoading] = useState(false);
+
+	const handleViewDocumentPopup = useCallback(async (doc: DocumentNodeDoc) => {
+		setViewingDoc(doc);
+		setViewingLoading(true);
+		try {
+			const fullDoc = await documentsApiService.getDocument({ id: doc.id });
+			setViewingContent(fullDoc.content);
+		} catch (err) {
+			console.error("[DocumentsSidebar] Failed to fetch document content:", err);
+			setViewingContent("Failed to load document content.");
+		} finally {
+			setViewingLoading(false);
+		}
+	}, []);
+
+	const handleCloseViewer = useCallback(() => {
+		setViewingDoc(null);
+		setViewingContent("");
+		setViewingLoading(false);
+	}, []);
+
 	const handleToggleChatMention = useCallback(
 		(doc: { id: number; title: string; document_type: string }, isMentioned: boolean) => {
 			if (isMentioned) {
@@ -622,6 +660,11 @@ export function DocumentsSidebar({
 						mentionedDocIds={mentionedDocIds}
 						onToggleChatMention={handleToggleChatMention}
 						isSearchMode={isSearchMode || activeTypes.length > 0}
+						onOpenInTab={!isMobileLayout ? (doc) => openDocumentTab({
+							documentId: doc.id,
+							searchSpaceId,
+							title: doc.title,
+						}) : undefined}
 					/>
 				) : (
 					<FolderTreeView
@@ -636,18 +679,24 @@ export function DocumentsSidebar({
 						onMoveFolder={handleMoveFolder}
 						onCreateFolder={handleCreateFolder}
 						onPreviewDocument={(doc) => {
-							openDocumentTab({
-								documentId: doc.id,
-								searchSpaceId,
-								title: doc.title,
-							});
+							if (isMobileLayout) {
+								handleViewDocumentPopup(doc);
+							} else {
+								openDocumentTab({
+									documentId: doc.id,
+									searchSpaceId,
+									title: doc.title,
+								});
+							}
 						}}
 						onEditDocument={(doc) => {
-							openDocumentTab({
-								documentId: doc.id,
-								searchSpaceId,
-								title: doc.title,
-							});
+							if (!isMobileLayout) {
+								openDocumentTab({
+									documentId: doc.id,
+									searchSpaceId,
+									title: doc.title,
+								});
+							}
 						}}
 						onDeleteDocument={(doc) => handleDeleteDocument(doc.id)}
 						onMoveDocument={handleMoveDocument}
@@ -675,6 +724,26 @@ export function DocumentsSidebar({
 				parentFolderName={createFolderParentName}
 				onConfirm={handleCreateFolderConfirm}
 			/>
+
+			<Drawer open={!!viewingDoc} onOpenChange={(open) => !open && handleCloseViewer()}>
+				<DrawerContent className="max-h-[85vh] flex flex-col">
+					<DrawerHandle />
+					<DrawerHeader className="text-left shrink-0">
+						<DrawerTitle className="text-base leading-tight break-words">
+							{viewingDoc?.title}
+						</DrawerTitle>
+					</DrawerHeader>
+					<div className="overflow-y-auto flex-1 min-h-0 px-4 pb-6 select-text text-xs [&_h1]:text-base! [&_h1]:mt-3! [&_h2]:text-sm! [&_h2]:mt-2! [&_h3]:text-xs! [&_h3]:mt-2!">
+						{viewingLoading ? (
+							<div className="flex items-center justify-center py-12">
+								<Spinner size="lg" className="text-muted-foreground" />
+							</div>
+						) : (
+							<MarkdownViewer content={viewingContent} />
+						)}
+					</div>
+				</DrawerContent>
+			</Drawer>
 		</>
 	);
 
diff --git a/surfsense_web/components/report-panel/report-panel.tsx b/surfsense_web/components/report-panel/report-panel.tsx
index f7d256a95..2dbdd894f 100644
--- a/surfsense_web/components/report-panel/report-panel.tsx
+++ b/surfsense_web/components/report-panel/report-panel.tsx
@@ -455,7 +455,7 @@ function MobileReportDrawer() {
 			shouldScaleBackground={false}
 		>
 			<DrawerContent
-				className="h-[95vh] max-h-[95vh] z-80 bg-sidebar overflow-hidden"
+				className="h-[90vh] max-h-[90vh] z-80 bg-sidebar overflow-hidden"
 				overlayClassName="z-80"
 			>
 				<DrawerHandle />