diff --git a/apps/client/src/layouts/desktop_layout.tsx b/apps/client/src/layouts/desktop_layout.tsx
index 511f6f9c00..4570e70ef3 100644
--- a/apps/client/src/layouts/desktop_layout.tsx
+++ b/apps/client/src/layouts/desktop_layout.tsx
@@ -30,6 +30,7 @@ import SpacerWidget from "../widgets/launch_bar/SpacerWidget.jsx";
 import InlineTitle from "../widgets/layout/InlineTitle.jsx";
 import NoteBadges from "../widgets/layout/NoteBadges.jsx";
 import NoteTitleActions from "../widgets/layout/NoteTitleActions.jsx";
+import StandaloneWarningBar from "../widgets/layout/StandaloneWarningBar.jsx";
 import StatusBar from "../widgets/layout/StatusBar.jsx";
 import NoteIconWidget from "../widgets/note_icon.jsx";
 import NoteTitleWidget from "../widgets/note_title.jsx";
@@ -186,6 +187,7 @@ export default class DesktopLayout {
                     )
             )
             .optChild(launcherPaneIsHorizontal && isNewLayout, <StatusBar />)
+            .optChild(glob.isStandalone, <StandaloneWarningBar />)
             .child(<CloseZenModeButton />)
 
             // Desktop-specific dialogs.
diff --git a/apps/client/src/layouts/mobile_layout.tsx b/apps/client/src/layouts/mobile_layout.tsx
index 8b162bced3..1a5b1d27a7 100644
--- a/apps/client/src/layouts/mobile_layout.tsx
+++ b/apps/client/src/layouts/mobile_layout.tsx
@@ -13,6 +13,7 @@ import LauncherContainer from "../widgets/launch_bar/LauncherContainer.jsx";
 import InlineTitle from "../widgets/layout/InlineTitle.jsx";
 import NoteBadges from "../widgets/layout/NoteBadges.jsx";
 import NoteTitleActions from "../widgets/layout/NoteTitleActions.jsx";
+import StandaloneWarningBar from "../widgets/layout/StandaloneWarningBar";
 import MobileDetailMenu from "../widgets/mobile_widgets/mobile_detail_menu.js";
 import ScreenContainer from "../widgets/mobile_widgets/screen_container.js";
 import SidebarContainer from "../widgets/mobile_widgets/sidebar_container.js";
@@ -24,9 +25,7 @@ import NoteWrapperWidget from "../widgets/note_wrapper.js";
 import NoteDetail from "../widgets/NoteDetail.jsx";
 import QuickSearchWidget from "../widgets/quick_search.js";
 import { useNoteContext } from "../widgets/react/hooks.jsx";
-import StandaloneRibbonAdapter from "../widgets/ribbon/components/StandaloneRibbonAdapter.jsx";
 import FilePropertiesTab from "../widgets/ribbon/FilePropertiesTab.jsx";
-import SearchDefinitionTab from "../widgets/ribbon/SearchDefinitionTab.jsx";
 import SearchResult from "../widgets/search_result.jsx";
 import MobileEditorToolbar from "../widgets/type_widgets/text/mobile_editor_toolbar.jsx";
 import { applyModals } from "./layout_commons.js";
@@ -58,6 +57,7 @@ export default class MobileLayout {
                             .child(
                                 new SplitNoteContainer(() =>
                                     new NoteWrapperWidget()
+                                        .optChild(glob.isStandalone, <StandaloneWarningBar />)
                                         .child(
                                             new FlexContainer("row")
                                                 .class("title-row note-split-title")
diff --git a/apps/client/src/widgets/layout/StandaloneWarningBar.tsx b/apps/client/src/widgets/layout/StandaloneWarningBar.tsx
new file mode 100644
index 0000000000..43a2c8af5f
--- /dev/null
+++ b/apps/client/src/widgets/layout/StandaloneWarningBar.tsx
@@ -0,0 +1,26 @@
+import { isMobile } from "../../services/utils";
+import Admonition from "../react/Admonition";
+
+export default function StandaloneWarningBar() {
+    return (
+        <div
+            className="standalone-warning-bar"
+            style={{
+                contain: "none"
+            }}
+        >
+            <Admonition
+                type="caution"
+                style={{
+                    margin: 0,
+                    fontSize: "0.8em"
+                }}
+            >
+                {isMobile()
+                    ? "Running Trilium standalone. Beware of data loss and other issues."
+                    : "You are running Trilium in standalone mode. Some features are not available, and you may experience issues or data loss. Use the desktop application or self-hosted server for the best experience."
+                }
+            </Admonition>
+        </div>
+    );
+}
diff --git a/apps/client/src/widgets/react/Admonition.tsx b/apps/client/src/widgets/react/Admonition.tsx
index 5fb86daf2a..726bb1b445 100644
--- a/apps/client/src/widgets/react/Admonition.tsx
+++ b/apps/client/src/widgets/react/Admonition.tsx
@@ -1,15 +1,16 @@
-import { ComponentChildren } from "preact";
+import { HTML } from "mermaid/dist/diagram-api/types.js";
+import { ComponentChildren, HTMLAttributes } from "preact";
 
-interface AdmonitionProps {
+interface AdmonitionProps extends Pick<HTMLAttributes<HTMLDivElement>, "style"> {
     type: "warning" | "note" | "caution";
     children: ComponentChildren;
     className?: string;
 }
 
-export default function Admonition({ type, children, className }: AdmonitionProps) {
+export default function Admonition({ type, children, className, ...props }: AdmonitionProps) {
     return (
-        <div className={`admonition ${type} ${className}`} role="alert">
+        <div className={`admonition ${type} ${className}`} role="alert" {...props}>
             {children}
         </div>
-    )
+    );
 }