diff --git a/pdf/lib/src/pdf/document.dart b/pdf/lib/src/pdf/document.dart
index 6c8a984c..a8ec75fc 100644
--- a/pdf/lib/src/pdf/document.dart
+++ b/pdf/lib/src/pdf/document.dart
@@ -16,6 +16,8 @@
 
 import 'dart:math' as math;
 import 'dart:typed_data';
+import 'dart:isolate';
+
 
 import 'package:crypto/crypto.dart';
 
@@ -255,7 +257,14 @@ class PdfDocument {
     if (prev != null) {
       os.putBytes(prev!.bytes);
     }
-    await _write(os);
+  await _write(os);
     return os.output();
   }
+  
+  /// [isolatedSave] this method is to isolate save in another thread to solve freezing app
+  Future<Uint8List> isolatedSave() async {
+     if(kIsWeb) return await save();
+   return Isolate.run(() async=>await save());
+    
+  }
 }