diff --git a/src/app/editor/page.tsx b/src/app/editor/page.tsx
index 5c4428d..f3d515a 100644
--- a/src/app/editor/page.tsx
+++ b/src/app/editor/page.tsx
@@ -820,6 +820,7 @@ function EditorPageInner() {
   useEffect(() => {
     if (!authChecked) return;
     if (typeof window === "undefined") return;
+    if ((window as any).__PB_DISABLE_AUTOSAVE) return;
 
     const slug = projectConfig?.slug?.trim();
     if (!slug) return;
@@ -861,6 +862,7 @@ function EditorPageInner() {
 
   useEffect(() => {
     if (typeof window === "undefined") return;
+    if ((window as any).__PB_DISABLE_AUTOSAVE) return;
 
     const slug = projectConfig?.slug?.trim();
     if (!slug) return;
diff --git a/src/app/preview/page.tsx b/src/app/preview/page.tsx
index 353c4bd..7e51462 100644
--- a/src/app/preview/page.tsx
+++ b/src/app/preview/page.tsx
@@ -42,6 +42,7 @@ export default function PreviewPage() {
 
   useEffect(() => {
     if (typeof window === "undefined") return;
+    if ((window as any).__PB_DISABLE_AUTOSAVE) return;
 
     const configSlugRaw = (projectConfig as any)?.slug?.trim?.();
     const configSlug =
diff --git a/tests/e2e/editor.spec.ts b/tests/e2e/editor.spec.ts
index e535579..34eff25 100644
--- a/tests/e2e/editor.spec.ts
+++ b/tests/e2e/editor.spec.ts
@@ -10,6 +10,8 @@ test.beforeEach(async ({ page }) => {
 			window.localStorage.clear();
 		} catch {
 		}
+
+		(window as any).__PB_DISABLE_AUTOSAVE = true;
 	});
 
 	await page.route("**/api/auth/me", async (route) => {
diff --git a/tests/e2e/form-editor-preview-parity.spec.ts b/tests/e2e/form-editor-preview-parity.spec.ts
index 7a74d19..d791208 100644
--- a/tests/e2e/form-editor-preview-parity.spec.ts
+++ b/tests/e2e/form-editor-preview-parity.spec.ts
@@ -11,6 +11,8 @@ test.beforeEach(async ({ page }) => {
       window.localStorage.clear();
     } catch {
     }
+
+    (window as any).__PB_DISABLE_AUTOSAVE = true;
   });
 
   await page.route("**/api/auth/me", async (route) => {
diff --git a/tests/e2e/preview.spec.ts b/tests/e2e/preview.spec.ts
index b6ed68c..7ec1b4b 100644
--- a/tests/e2e/preview.spec.ts
+++ b/tests/e2e/preview.spec.ts
@@ -27,6 +27,8 @@ test.beforeEach(async ({ page }) => {
     } catch {
       // localStorage 접근 실패는 테스트 진행에 치명적이지 않으므로 조용히 무시한다.
     }
+
+    (window as any).__PB_DISABLE_AUTOSAVE = true;
   });
 
   await page.route("**/api/auth/me", async (route) => {