diff --git a/native/cpp/CommonCpp/NativeModules/CommUtilsModule.h b/native/cpp/CommonCpp/NativeModules/CommUtilsModule.h
--- a/native/cpp/CommonCpp/NativeModules/CommUtilsModule.h
+++ b/native/cpp/CommonCpp/NativeModules/CommUtilsModule.h
@@ -29,6 +29,8 @@
   readBufferFromFile(jsi::Runtime &rt, jsi::String path) override;
   virtual jsi::String
   base64EncodeBuffer(jsi::Runtime &rt, jsi::Object data) override;
+  virtual jsi::Object
+  base64DecodeBuffer(jsi::Runtime &rt, jsi::String base64) override;
   virtual jsi::String sha256(jsi::Runtime &rt, jsi::Object data) override;
 
 public:
diff --git a/native/cpp/CommonCpp/NativeModules/CommUtilsModule.cpp b/native/cpp/CommonCpp/NativeModules/CommUtilsModule.cpp
--- a/native/cpp/CommonCpp/NativeModules/CommUtilsModule.cpp
+++ b/native/cpp/CommonCpp/NativeModules/CommUtilsModule.cpp
@@ -113,6 +113,23 @@
   return jsi::String::createFromUtf8(rt, base64);
 }
 
+jsi::Object
+CommUtilsModule::base64DecodeBuffer(jsi::Runtime &rt, jsi::String base64) {
+  auto bytes = Base64::decode(base64.utf8(rt));
+  auto size = bytes.size();
+
+  auto arrayBuffer =
+      rt.global()
+          .getPropertyAsFunction(rt, "ArrayBuffer")
+          // ArrayBuffer constructor takes one parameter: byte length
+          .callAsConstructor(rt, {static_cast<double>(size)})
+          .asObject(rt)
+          .getArrayBuffer(rt);
+
+  memcpy(arrayBuffer.data(rt), bytes.data(), size);
+  return arrayBuffer;
+}
+
 jsi::String CommUtilsModule::sha256(jsi::Runtime &rt, jsi::Object data) {
   auto arrayBuffer = data.getArrayBuffer(rt);
   auto inputPtr = arrayBuffer.data(rt);
diff --git a/native/cpp/CommonCpp/_generated/utilsJSI-generated.cpp b/native/cpp/CommonCpp/_generated/utilsJSI-generated.cpp
--- a/native/cpp/CommonCpp/_generated/utilsJSI-generated.cpp
+++ b/native/cpp/CommonCpp/_generated/utilsJSI-generated.cpp
@@ -21,6 +21,9 @@
 static jsi::Value __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_base64EncodeBuffer(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<CommUtilsModuleSchemaCxxSpecJSI *>(&turboModule)->base64EncodeBuffer(rt, args[0].asObject(rt));
 }
+static jsi::Value __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_base64DecodeBuffer(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
+  return static_cast<CommUtilsModuleSchemaCxxSpecJSI *>(&turboModule)->base64DecodeBuffer(rt, args[0].asString(rt));
+}
 static jsi::Value __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_sha256(jsi::Runtime &rt, TurboModule &turboModule, const jsi::Value* args, size_t count) {
   return static_cast<CommUtilsModuleSchemaCxxSpecJSI *>(&turboModule)->sha256(rt, args[0].asObject(rt));
 }
@@ -30,6 +33,7 @@
   methodMap_["writeBufferToFile"] = MethodMetadata {2, __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_writeBufferToFile};
   methodMap_["readBufferFromFile"] = MethodMetadata {1, __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_readBufferFromFile};
   methodMap_["base64EncodeBuffer"] = MethodMetadata {1, __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_base64EncodeBuffer};
+  methodMap_["base64DecodeBuffer"] = MethodMetadata {1, __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_base64DecodeBuffer};
   methodMap_["sha256"] = MethodMetadata {1, __hostFunction_CommUtilsModuleSchemaCxxSpecJSI_sha256};
 }
 
diff --git a/native/cpp/CommonCpp/_generated/utilsJSI.h b/native/cpp/CommonCpp/_generated/utilsJSI.h
--- a/native/cpp/CommonCpp/_generated/utilsJSI.h
+++ b/native/cpp/CommonCpp/_generated/utilsJSI.h
@@ -23,6 +23,7 @@
   virtual jsi::Value writeBufferToFile(jsi::Runtime &rt, jsi::String path, jsi::Object data) = 0;
   virtual jsi::Value readBufferFromFile(jsi::Runtime &rt, jsi::String path) = 0;
   virtual jsi::String base64EncodeBuffer(jsi::Runtime &rt, jsi::Object data) = 0;
+  virtual jsi::Object base64DecodeBuffer(jsi::Runtime &rt, jsi::String base64) = 0;
   virtual jsi::String sha256(jsi::Runtime &rt, jsi::Object data) = 0;
 
 };
@@ -69,6 +70,14 @@
       return bridging::callFromJs<jsi::String>(
           rt, &T::base64EncodeBuffer, jsInvoker_, instance_, std::move(data));
     }
+    jsi::Object base64DecodeBuffer(jsi::Runtime &rt, jsi::String base64) override {
+      static_assert(
+          bridging::getParameterCount(&T::base64DecodeBuffer) == 2,
+          "Expected base64DecodeBuffer(...) to have 2 parameters");
+
+      return bridging::callFromJs<jsi::Object>(
+          rt, &T::base64DecodeBuffer, jsInvoker_, instance_, std::move(base64));
+    }
     jsi::String sha256(jsi::Runtime &rt, jsi::Object data) override {
       static_assert(
           bridging::getParameterCount(&T::sha256) == 2,
diff --git a/native/schema/CommUtilsModuleSchema.js b/native/schema/CommUtilsModuleSchema.js
--- a/native/schema/CommUtilsModuleSchema.js
+++ b/native/schema/CommUtilsModuleSchema.js
@@ -12,6 +12,7 @@
   +writeBufferToFile: (path: string, data: JSIArrayBuffer) => Promise<void>;
   +readBufferFromFile: (path: string) => Promise<JSIArrayBuffer>;
   +base64EncodeBuffer: (data: JSIArrayBuffer) => string;
+  +base64DecodeBuffer: (base64: string) => JSIArrayBuffer;
   // crypto utils
   +sha256: (data: JSIArrayBuffer) => string;
 }
@@ -21,6 +22,7 @@
   +writeBufferToFile: (path: string, data: ArrayBuffer) => Promise<void>;
   +readBufferFromFile: (path: string) => Promise<ArrayBuffer>;
   +base64EncodeBuffer: (data: ArrayBuffer) => string;
+  +base64DecodeBuffer: (base64: string) => ArrayBuffer;
   +sha256: (data: ArrayBuffer) => string;
 }