diff --git a/apps/frontend/src/app/page.tsx b/apps/frontend/src/app/page.tsx
index 52f7829..aecbd6a 100644
--- a/apps/frontend/src/app/page.tsx
+++ b/apps/frontend/src/app/page.tsx
@@ -217,7 +217,34 @@ export default function App() {
       const response = await fetch(photo.src);
       if (!response.ok) throw new Error("Failed to fetch image");
       
-      const blob = await response.blob();
+      let blob = await response.blob();
+      
+      // 대부분의 브라우저는 클립보드 복사 시 image/png만 지원하므로,
+      // 형식이 다를 경우 canvas를 이용해 PNG로 변환합니다.
+      if (blob.type !== "image/png") {
+        const img = new Image();
+        const url = URL.createObjectURL(blob);
+        img.src = url;
+        
+        await new Promise((resolve, reject) => {
+          img.onload = resolve;
+          img.onerror = reject;
+        });
+        
+        const canvas = document.createElement("canvas");
+        canvas.width = img.width;
+        canvas.height = img.height;
+        const ctx = canvas.getContext("2d");
+        if (!ctx) throw new Error("Canvas context를 가져오지 못했습니다.");
+        ctx.drawImage(img, 0, 0);
+        
+        const pngBlob = await new Promise<Blob | null>((resolve) => canvas.toBlob(resolve, "image/png"));
+        URL.revokeObjectURL(url);
+        
+        if (!pngBlob) throw new Error("PNG 변환에 실패했습니다.");
+        blob = pngBlob;
+      }
+      
       const clipboardItem = new ClipboardItem({
         [blob.type]: blob
       });