diff --git a/app/Http/Controllers/ESign/EsignApiController.php b/app/Http/Controllers/ESign/EsignApiController.php
index 56bb3db5..42986f1f 100644
--- a/app/Http/Controllers/ESign/EsignApiController.php
+++ b/app/Http/Controllers/ESign/EsignApiController.php
@@ -37,14 +37,20 @@ public function getStamp(): JsonResponse
         }
 
         $path = $setting->setting_value['image_path'];
-        $exists = Storage::disk('local')->exists($path);
+        if (!Storage::disk('local')->exists($path)) {
+            return response()->json(['success' => true, 'data' => null]);
+        }
+
+        $content = Storage::disk('local')->get($path);
+        $mime = Storage::disk('local')->mimeType($path) ?: 'image/png';
+        $dataUrl = 'data:' . $mime . ';base64,' . base64_encode($content);
 
         return response()->json([
             'success' => true,
-            'data' => $exists ? [
+            'data' => [
                 'image_path' => $path,
-                'image_url' => '/storage/' . $path,
-            ] : null,
+                'image_url' => $dataUrl,
+            ],
         ]);
     }
 
@@ -85,12 +91,15 @@ public function uploadStamp(Request $request): JsonResponse
             ]
         );
 
+        $mime = Storage::disk('local')->mimeType($path) ?: 'image/png';
+        $dataUrl = 'data:' . $mime . ';base64,' . base64_encode($imageData);
+
         return response()->json([
             'success' => true,
             'message' => '법인도장이 등록되었습니다.',
             'data' => [
                 'image_path' => $path,
-                'image_url' => '/storage/' . $path,
+                'image_url' => $dataUrl,
             ],
         ]);
     }
diff --git a/resources/views/esign/create.blade.php b/resources/views/esign/create.blade.php
index 18661c26..09fc76e3 100644
--- a/resources/views/esign/create.blade.php
+++ b/resources/views/esign/create.blade.php
@@ -245,7 +245,7 @@ className="w-full border border-gray-300 rounded-md px-2.5 py-1.5 text-sm focus:
                             </div>
                             {registeredStamp ? (
                                 <div className="flex items-center gap-3">
-                                    <img src={registeredStamp.image_url + '?t=' + Date.now()} alt="법인도장" className="h-16 w-16 object-contain border border-blue-300 rounded bg-white p-1" />
+                                    <img src={registeredStamp.image_url} alt="법인도장" className="h-16 w-16 object-contain border border-blue-300 rounded bg-white p-1" />
                                     <div className="flex-1">
                                         <p className="text-xs text-blue-700">등록된 법인도장이 자동 적용됩니다.</p>
                                         <a href="/esign#settings" className="text-[11px] text-blue-500 hover:underline">대시보드에서 변경</a>
diff --git a/resources/views/esign/dashboard.blade.php b/resources/views/esign/dashboard.blade.php
index b5c3a756..b32d2ae4 100644
--- a/resources/views/esign/dashboard.blade.php
+++ b/resources/views/esign/dashboard.blade.php
@@ -440,7 +440,7 @@ className={`px-3 py-1 text-sm rounded ${p === pagination.current_page ? 'bg-blue
                 {stamp ? (
                     <div className="flex items-start gap-4">
                         <div className="border rounded-lg p-3 bg-gray-50">
-                            <img src={stamp.image_url + '?t=' + Date.now()} alt="법인도장" className="h-24 w-24 object-contain" />
+                            <img src={stamp.image_url} alt="법인도장" className="h-24 w-24 object-contain" />
                         </div>
                         <div className="flex-1 pt-2">
                             <p className="text-sm text-green-700 font-medium mb-1">법인도장이 등록되어 있습니다.</p>