diff --git a/src/extensions/core/index.ts b/src/extensions/core/index.ts
index f50493d82..e1675dfb2 100644
--- a/src/extensions/core/index.ts
+++ b/src/extensions/core/index.ts
@@ -1,4 +1,4 @@
-import { isCloud } from '@/platform/distribution/types'
+import { isCloud, isNightly } from '@/platform/distribution/types'
 
 import './clipspace'
 import './contextMenuFilter'
@@ -38,3 +38,8 @@ if (isCloud) {
     await import('./cloudSubscription')
   }
 }
+
+// Nightly-only extensions
+if (isNightly && !isCloud) {
+  await import('./nightlyBadges')
+}
diff --git a/src/extensions/core/nightlyBadges.ts b/src/extensions/core/nightlyBadges.ts
new file mode 100644
index 000000000..a453a6397
--- /dev/null
+++ b/src/extensions/core/nightlyBadges.ts
@@ -0,0 +1,17 @@
+import { t } from '@/i18n'
+import { useExtensionService } from '@/services/extensionService'
+import type { TopbarBadge } from '@/types/comfy'
+
+const badges: TopbarBadge[] = [
+  {
+    text: t('nightly.badge.label'),
+    label: t('g.nightly'),
+    variant: 'warning',
+    tooltip: t('nightly.badge.tooltip')
+  }
+]
+
+useExtensionService().registerExtension({
+  name: 'Comfy.Nightly.Badges',
+  topbarBadges: badges
+})
diff --git a/src/locales/en/main.json b/src/locales/en/main.json
index 16116ac1c..9dacb3d64 100644
--- a/src/locales/en/main.json
+++ b/src/locales/en/main.json
@@ -275,6 +275,7 @@
     "1x": "1x",
     "2x": "2x",
     "beta": "BETA",
+    "nightly": "NIGHTLY",
     "profile": "Profile",
     "noItems": "No items"
   },
@@ -2634,5 +2635,11 @@
       "workspaceNotFound": "Workspace not found",
       "tokenExchangeFailed": "Failed to authenticate with workspace: {error}"
     }
+  },
+  "nightly": {
+    "badge": {
+      "label": "Preview Version",
+      "tooltip": "You are using a nightly version of ComfyUI. Please use the feedback button to share your thoughts about these features."
+    }
   }
 }
\ No newline at end of file