diff --git a/CHANGELOG.md b/CHANGELOG.md
index 161bdc9fd..305ca0d4f 100644
--- a/CHANGELOG.md
+++ b/CHANGELOG.md
@@ -19,6 +19,9 @@
 
 ### UI
 
+- Toast notifications via Reka UI Toast — top-center blue pill for info, red for errors
+- Global error handler (window.error + unhandledrejection) shows errors as toasts
+- Link copied toast on share and copy link actions
 - HsvColorArea extracted as shared component (ColorPicker + FillPicker)
 - Scrollable app menu without visible scrollbar
 - Selection broadcasting to remote peers
diff --git a/components.d.ts b/components.d.ts
index 5345b737b..b6654b790 100644
--- a/components.d.ts
+++ b/components.d.ts
@@ -14,6 +14,7 @@ declare module 'vue' {
     APIKeySetup: typeof import('./src/components/chat/APIKeySetup.vue')['default']
     AppearanceSection: typeof import('./src/components/properties/AppearanceSection.vue')['default']
     AppMenu: typeof import('./src/components/AppMenu.vue')['default']
+    AppToast: typeof import('./src/components/AppToast.vue')['default']
     CanvasContextMenu: typeof import('./src/components/CanvasContextMenu.vue')['default']
     ChatInput: typeof import('./src/components/chat/ChatInput.vue')['default']
     ChatMessage: typeof import('./src/components/chat/ChatMessage.vue')['default']
@@ -31,6 +32,7 @@ declare module 'vue' {
     FontPicker: typeof import('./src/components/FontPicker.vue')['default']
     HsvColorArea: typeof import('./src/components/HsvColorArea.vue')['default']
     IconLucideALargeSmall: typeof import('~icons/lucide/a-large-small')['default']
+    IconLucideAlertTriangle: typeof import('~icons/lucide/alert-triangle')['default']
     IconLucideAlignCenter: typeof import('~icons/lucide/align-center')['default']
     IconLucideAlignHorizontalJustifyCenter: typeof import('~icons/lucide/align-horizontal-justify-center')['default']
     IconLucideAlignHorizontalJustifyEnd: typeof import('~icons/lucide/align-horizontal-justify-end')['default']
diff --git a/src/App.vue b/src/App.vue
index 7c2aa3f3e..db52a9dfb 100644
--- a/src/App.vue
+++ b/src/App.vue
@@ -1,3 +1,15 @@
+<script setup lang="ts">
+import { onMounted } from 'vue'
+
+import AppToast from '@/components/AppToast.vue'
+import { toast } from '@/composables/use-toast'
+
+onMounted(() => {
+  toast.setupGlobalErrorHandler()
+})
+</script>
+
 <template>
   <RouterView />
+  <AppToast />
 </template>
diff --git a/src/components/AppToast.vue b/src/components/AppToast.vue
new file mode 100644
index 000000000..407e07a6f
--- /dev/null
+++ b/src/components/AppToast.vue
@@ -0,0 +1,29 @@
+<script setup lang="ts">
+import { ToastProvider, ToastRoot, ToastDescription, ToastViewport } from 'reka-ui'
+
+import { toast } from '@/composables/use-toast'
+</script>
+
+<template>
+  <ToastProvider :duration="toast.TOAST_DURATION" swipe-direction="up">
+    <ToastRoot
+      v-for="t in toast.toasts.value"
+      :key="t.id"
+      class="flex items-center gap-1.5 rounded-md px-2.5 py-1.5 text-xs text-white shadow-md data-[state=open]:animate-in data-[state=closed]:animate-out data-[state=open]:fade-in data-[state=open]:slide-in-from-top-1 data-[state=closed]:fade-out data-[state=closed]:slide-out-to-top-1 data-[swipe=move]:translate-y-[var(--reka-toast-swipe-move-y)] data-[swipe=cancel]:translate-y-0 data-[swipe=cancel]:transition-transform"
+      :class="t.variant === 'error' ? 'bg-red-600' : 'bg-blue-600'"
+      @update:open="
+        (open) => {
+          if (!open) toast.remove(t.id)
+        }
+      "
+    >
+      <icon-lucide-check v-if="t.variant === 'default'" class="size-3 shrink-0" />
+      <icon-lucide-alert-triangle v-else class="size-3 shrink-0" />
+      <ToastDescription>{{ t.message }}</ToastDescription>
+    </ToastRoot>
+
+    <ToastViewport
+      class="fixed top-2 left-1/2 z-[9999] flex -translate-x-1/2 flex-col items-center gap-1.5"
+    />
+  </ToastProvider>
+</template>
diff --git a/src/components/CollabPanel.vue b/src/components/CollabPanel.vue
index 7984c7c48..e21a6855e 100644
--- a/src/components/CollabPanel.vue
+++ b/src/components/CollabPanel.vue
@@ -13,6 +13,7 @@ import {
 } from 'reka-ui'
 
 import type { CollabState, RemotePeer } from '@/composables/use-collab'
+import { toast } from '@/composables/use-toast'
 import type { Color } from '@/types'
 
 const props = defineProps<{
@@ -45,6 +46,7 @@ const isJoining = computed(() => !!props.pendingRoomId && !props.state.connected
 function copyLink() {
   if (!shareUrl.value) return
   navigator.clipboard.writeText(shareUrl.value)
+  toast.show('Link copied to clipboard')
   copied.value = true
   setTimeout(() => {
     copied.value = false
diff --git a/src/composables/use-toast.ts b/src/composables/use-toast.ts
new file mode 100644
index 000000000..e7163a2d5
--- /dev/null
+++ b/src/composables/use-toast.ts
@@ -0,0 +1,34 @@
+import { ref } from 'vue'
+
+export type ToastVariant = 'default' | 'error'
+
+export interface Toast {
+  id: number
+  message: string
+  variant: ToastVariant
+}
+
+const TOAST_DURATION = 3000
+
+const toasts = ref<Toast[]>([])
+let nextId = 0
+
+function show(message: string, variant: ToastVariant = 'default') {
+  toasts.value.push({ id: ++nextId, message, variant })
+}
+
+function remove(id: number) {
+  toasts.value = toasts.value.filter((t) => t.id !== id)
+}
+
+function setupGlobalErrorHandler() {
+  window.addEventListener('error', (e) => {
+    show(e.message || 'An unexpected error occurred', 'error')
+  })
+  window.addEventListener('unhandledrejection', (e) => {
+    const msg = e.reason instanceof Error ? e.reason.message : String(e.reason)
+    show(msg || 'An unexpected error occurred', 'error')
+  })
+}
+
+export const toast = { show, remove, toasts, setupGlobalErrorHandler, TOAST_DURATION }
diff --git a/src/views/EditorView.vue b/src/views/EditorView.vue
index 90a718de2..84d62b11e 100644
--- a/src/views/EditorView.vue
+++ b/src/views/EditorView.vue
@@ -7,6 +7,7 @@ import { SplitterGroup, SplitterPanel, SplitterResizeHandle } from 'reka-ui'
 import { useKeyboard } from '@/composables/use-keyboard'
 import { useMenu } from '@/composables/use-menu'
 import { useCollab, COLLAB_KEY } from '@/composables/use-collab'
+import { toast } from '@/composables/use-toast'
 import { createDemoShapes } from '@/demo'
 import { provideEditorStore } from '@/stores/editor'
 
@@ -47,6 +48,8 @@ const pendingRoomId = (route.params.roomId as string) || null
 function onShare() {
   const roomId = collab.shareCurrentDoc()
   router.push(`/share/${roomId}`)
+  navigator.clipboard.writeText(`${window.location.origin}/share/${roomId}`)
+  toast.show('Link copied to clipboard')
 }
 
 function onJoin(roomId: string) {