diff --git a/compiler/mio-tflite2121/CMakeLists.txt b/compiler/mio-tflite2121/CMakeLists.txt
new file mode 100644
index 00000000000..1ca8e75816a
--- /dev/null
+++ b/compiler/mio-tflite2121/CMakeLists.txt
@@ -0,0 +1,60 @@
+nnas_find_package(FlatBuffers EXACT 2.0 QUIET)
+
+if(NOT FlatBuffers_FOUND)
+  message(STATUS "Build mio-tflite2121: FAILED (missing Flatbuffers 2.0)")
+  return()
+endif(NOT FlatBuffers_FOUND)
+
+nnas_find_package(TensorFlowSource EXACT 2.12.1 QUIET)
+
+if(NOT TensorFlowSource_FOUND)
+  message(STATUS "Build mio-tflite2121: FAILED (missing TensorFlowSource 2.12.1)")
+  return()
+endif(NOT TensorFlowSource_FOUND)
+
+message(STATUS "Build mio-tflite2121: TRUE")
+message(STATUS "Build mio-tflite2121: with ${TensorFlowSource_DIR}")
+
+set(SCHEMA_FILE "${TensorFlowSource_DIR}/tensorflow/lite/schema/schema.fbs")
+
+# NOTE Use copy of schema.fbs as to provide unified way for circle also
+add_custom_command(OUTPUT "${CMAKE_CURRENT_BINARY_DIR}/schema.fbs"
+  COMMAND ${CMAKE_COMMAND} -E copy "${SCHEMA_FILE}" schema.fbs
+  WORKING_DIRECTORY "${CMAKE_CURRENT_BINARY_DIR}"
+  DEPENDS "${SCHEMA_FILE}"
+)
+
+FlatBuffers_Target(mio_tflite2121
+  OUTPUT_DIR "${CMAKE_CURRENT_BINARY_DIR}/gen/mio/tflite"
+  INCLUDE_DIR "${CMAKE_CURRENT_BINARY_DIR}/gen"
+  SCHEMA_DIR "${CMAKE_CURRENT_BINARY_DIR}"
+  SCHEMA_FILES "schema.fbs"
+)
+
+add_executable(mio_tflite2121_example example.cpp)
+target_link_libraries(mio_tflite2121_example mio_tflite2121)
+
+# Temporay tflite validation tool to replace nnkit-tflite
+# TODO provide full tflite validation with runtime/interpreter
+add_executable(mio_tflite2121_validate example.cpp)
+target_link_libraries(mio_tflite2121_validate mio_tflite2121)
+
+file(GLOB_RECURSE SOURCES "src/*.cpp")
+file(GLOB_RECURSE TESTS "src/*.test.cpp")
+list(REMOVE_ITEM SOURCES ${TESTS})
+
+add_library(mio_tflite2121_helper STATIC ${SOURCES})
+target_include_directories(mio_tflite2121_helper PRIVATE src)
+target_include_directories(mio_tflite2121_helper PUBLIC include)
+target_link_libraries(mio_tflite2121_helper mio_tflite2121)
+
+if(NOT ENABLE_TEST)
+  return()
+endif(NOT ENABLE_TEST)
+
+nnas_find_package(GTest REQUIRED)
+
+GTest_AddTest(mio_tflite2121_helper_test ${TESTS})
+target_include_directories(mio_tflite2121_helper_test PRIVATE src)
+target_link_libraries(mio_tflite2121_helper_test mio_tflite2121)
+target_link_libraries(mio_tflite2121_helper_test mio_tflite2121_helper)
diff --git a/compiler/mio-tflite2121/README.md b/compiler/mio-tflite2121/README.md
new file mode 100644
index 00000000000..a922f304b09
--- /dev/null
+++ b/compiler/mio-tflite2121/README.md
@@ -0,0 +1,3 @@
+# mio-tflite2121
+
+_mio-tflite2121_ provides a library to access TensorFlow lite model files with V2.12.1.
diff --git a/compiler/mio-tflite2121/example.cpp b/compiler/mio-tflite2121/example.cpp
new file mode 100644
index 00000000000..54fe9e79938
--- /dev/null
+++ b/compiler/mio-tflite2121/example.cpp
@@ -0,0 +1,41 @@
+/*
+ * Copyright (c) 2023 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+//
+// This example shows how to include and use "mio-tflite2121"
+//
+#include <mio/tflite/schema_generated.h>
+
+#include <fstream>
+#include <iostream>
+#include <vector>
+
+int main(int argc, char **argv)
+{
+  std::ifstream ifs(argv[1], std::ios_base::binary);
+  std::vector<char> buf(std::istreambuf_iterator<char>{ifs}, std::istreambuf_iterator<char>{});
+
+  flatbuffers::Verifier verifier{reinterpret_cast<uint8_t *>(buf.data()), buf.size()};
+
+  if (!tflite::VerifyModelBuffer(verifier))
+  {
+    std::cout << "Fail" << std::endl;
+    return 255;
+  }
+
+  std::cout << "Pass" << std::endl;
+  return 0;
+}
diff --git a/compiler/mio-tflite2121/include/mio_tflite2121/Helper.h b/compiler/mio-tflite2121/include/mio_tflite2121/Helper.h
new file mode 100644
index 00000000000..f2062600af7
--- /dev/null
+++ b/compiler/mio-tflite2121/include/mio_tflite2121/Helper.h
@@ -0,0 +1,37 @@
+/*
+ * Copyright (c) 2023 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#ifndef __MIO_TFLITE2121_HELPER_H__
+#define __MIO_TFLITE2121_HELPER_H__
+
+#include <mio/tflite/schema_generated.h>
+
+namespace mio
+{
+namespace tflite
+{
+
+::tflite::BuiltinOperator builtin_code_neutral(const ::tflite::OperatorCode *opcode);
+bool is_valid(const ::tflite::OperatorCode *opcode);
+bool is_custom(const ::tflite::OperatorCode *opcode);
+std::string opcode_name(const ::tflite::OperatorCode *opcode);
+const char *tensor_type(const ::tflite::Tensor *tensor);
+const char *tensor_name(const ::tflite::Tensor *tensor);
+
+} // namespace tflite
+} // namespace mio
+
+#endif // __MIO_TFLITE2121_HELPER_H__
diff --git a/compiler/mio-tflite2121/src/Helper.cpp b/compiler/mio-tflite2121/src/Helper.cpp
new file mode 100644
index 00000000000..b0d1ba1075c
--- /dev/null
+++ b/compiler/mio-tflite2121/src/Helper.cpp
@@ -0,0 +1,104 @@
+/*
+ * Copyright (c) 2023 Samsung Electronics Co., Ltd. All Rights Reserved
+ * Copyright 2020 The TensorFlow Authors. All Rights Reserved.
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mio_tflite2121/Helper.h"
+
+#include <sstream>
+
+namespace mio
+{
+namespace tflite
+{
+
+/**
+ * This will provide v3/v3a format neutral BuiltinOperator
+ *
+ * This function referenced
+ * https://github.com/tensorflow/tensorflow/blob/7d12007d7800d3714a02e05059f3ea602d1aec78/tensorflow/lite/schema/schema_utils.cc
+ */
+::tflite::BuiltinOperator builtin_code_neutral(const ::tflite::OperatorCode *opcode)
+{
+  assert(opcode != nullptr);
+  return std::max(opcode->builtin_code(),
+                  static_cast<::tflite::BuiltinOperator>(opcode->deprecated_builtin_code()));
+}
+
+bool is_valid(const ::tflite::OperatorCode *opcode)
+{
+  // Valid Range : 0 <= deprecated_builtin_code <= 127
+  const int8_t deprecated_builtin_code = opcode->deprecated_builtin_code();
+  if (deprecated_builtin_code < 0)
+    return false;
+
+  const ::tflite::BuiltinOperator builtin_code = opcode->builtin_code();
+  if (!(::tflite::BuiltinOperator_MIN <= builtin_code &&
+        builtin_code <= ::tflite::BuiltinOperator_MAX))
+    return false;
+
+  return true;
+}
+
+bool is_custom(const ::tflite::OperatorCode *opcode)
+{
+  ::tflite::BuiltinOperator code = builtin_code_neutral(opcode);
+  return (code == ::tflite::BuiltinOperator_CUSTOM);
+}
+
+std::string opcode_name(const ::tflite::OperatorCode *opcode)
+{
+  assert(opcode);
+
+  if (!is_valid(opcode))
+  {
+    std::ostringstream oss;
+    oss << "(invalid)";
+    return oss.str();
+  }
+
+  if (is_custom(opcode))
+  {
+    if (!opcode->custom_code())
+      return "(invalid custom)";
+
+    std::string custom_op = "CUSTOM(";
+    custom_op += opcode->custom_code()->c_str();
+    custom_op += ")";
+    return custom_op;
+  }
+
+  ::tflite::BuiltinOperator code = builtin_code_neutral(opcode);
+  return ::tflite::EnumNameBuiltinOperator(code);
+}
+
+const char *tensor_type(const ::tflite::Tensor *tensor)
+{
+  return ::tflite::EnumNameTensorType(tensor->type());
+}
+
+const char *tensor_name(const ::tflite::Tensor *tensor)
+{
+  static const char *kEmptyTensorName = "(noname)";
+
+  auto name = tensor->name();
+  if (name)
+    return name->c_str();
+
+  return kEmptyTensorName;
+}
+
+} // namespace tflite
+} // namespace mio
diff --git a/compiler/mio-tflite2121/src/Helper.test.cpp b/compiler/mio-tflite2121/src/Helper.test.cpp
new file mode 100644
index 00000000000..1527a49560c
--- /dev/null
+++ b/compiler/mio-tflite2121/src/Helper.test.cpp
@@ -0,0 +1,159 @@
+/*
+ * Copyright (c) 2023 Samsung Electronics Co., Ltd. All Rights Reserved
+ *
+ * Licensed under the Apache License, Version 2.0 (the "License");
+ * you may not use this file except in compliance with the License.
+ * You may obtain a copy of the License at
+ *
+ *    http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+#include "mio_tflite2121/Helper.h"
+
+#include <flatbuffers/flatbuffers.h>
+#include <gtest/gtest.h>
+
+#include <vector>
+
+class mio_tflite2121_helper_test : public ::testing::Test
+{
+protected:
+  void initialization_finish(void)
+  {
+    _fbb.Finish(tflite::CreateModelDirect(_fbb, 0, &_opcodes_vec));
+  }
+
+protected:
+  void add_operator_code(int8_t deprecated_builtin_code, const char *custom_code,
+                         tflite::BuiltinOperator builtin_code)
+  {
+    _opcodes_vec.push_back(tflite::CreateOperatorCodeDirect(
+      _fbb, deprecated_builtin_code, custom_code, 1 /* version */, builtin_code));
+  }
+
+  const tflite::OperatorCode *get_operator_code(uint8_t idx)
+  {
+    return tflite::GetModel(_fbb.GetBufferPointer())->operator_codes()->Get(idx);
+  }
+
+private:
+  flatbuffers::FlatBufferBuilder _fbb;
+  std::vector<flatbuffers::Offset<tflite::OperatorCode>> _opcodes_vec;
+};
+
+/**
+ * Extended 'builtin_code' is not in TFLite schema v3.
+ *
+ * Thus it is filled with 0(BuiltinOperator_ADD) in schame v3. Please refer to
+ * https://github.com/tensorflow/tensorflow/blob/1ab788fa8d08430be239ab970980b891ad7af494/tensorflow/lite/schema/schema_utils.cc#L28-L31
+ */
+TEST_F(mio_tflite2121_helper_test, v3)
+{
+  // BuiltinOperator_ADD = 0
+  // BuiltinOperator_CONV_2D = 3
+  add_operator_code(3, "", tflite::BuiltinOperator_ADD);
+  initialization_finish();
+
+  ASSERT_TRUE(mio::tflite::is_valid(get_operator_code(0)));
+  ASSERT_EQ(mio::tflite::builtin_code_neutral(get_operator_code(0)),
+            tflite::BuiltinOperator_CONV_2D);
+  ASSERT_FALSE(mio::tflite::is_custom(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3_custom)
+{
+  // BuiltinOperator_ADD = 0
+  // BuiltinOperator_CUSTOM = 32
+  add_operator_code(32, "custom", tflite::BuiltinOperator_ADD);
+  initialization_finish();
+
+  ASSERT_TRUE(mio::tflite::is_valid(get_operator_code(0)));
+  ASSERT_EQ(mio::tflite::builtin_code_neutral(get_operator_code(0)),
+            tflite::BuiltinOperator_CUSTOM);
+  ASSERT_TRUE(mio::tflite::is_custom(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3_NEG)
+{
+  // BuiltinOperator_ADD = 0
+  // BuiltinOperator_CUMSUM = 128
+  // deprecated_builtin_code cannot be negative value
+  add_operator_code(128, "", tflite::BuiltinOperator_ADD);
+  initialization_finish();
+
+  ASSERT_FALSE(mio::tflite::is_valid(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_under127)
+{
+  // BuiltinOperator_CONV_2D = 3
+  add_operator_code(3, "", tflite::BuiltinOperator_CONV_2D);
+  initialization_finish();
+
+  ASSERT_TRUE(mio::tflite::is_valid(get_operator_code(0)));
+  ASSERT_EQ(mio::tflite::builtin_code_neutral(get_operator_code(0)),
+            tflite::BuiltinOperator_CONV_2D);
+  ASSERT_FALSE(mio::tflite::is_custom(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_under127_NEG)
+{
+  // BuiltinOperator_CONV_2D = 3
+  // BuiltinOperator_CUMSUM = 128
+  // deprecated_builtin_code cannot be negative value
+  add_operator_code(128, "", tflite::BuiltinOperator_CONV_2D);
+  initialization_finish();
+
+  ASSERT_FALSE(mio::tflite::is_valid(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_custom)
+{
+  // BuiltinOperator_CUSTOM = 32
+  add_operator_code(32, "custom", tflite::BuiltinOperator_CUSTOM);
+  initialization_finish();
+
+  ASSERT_TRUE(mio::tflite::is_valid(get_operator_code(0)));
+  ASSERT_EQ(mio::tflite::builtin_code_neutral(get_operator_code(0)),
+            tflite::BuiltinOperator_CUSTOM);
+  ASSERT_TRUE(mio::tflite::is_custom(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_custom_NEG)
+{
+  // BuiltinOperator_CUMSUM = 128
+  // deprecated_builtin_code cannot be negative value
+  add_operator_code(128, "custom", tflite::BuiltinOperator_CUSTOM);
+  initialization_finish();
+
+  ASSERT_FALSE(mio::tflite::is_valid(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_over127)
+{
+  // BuiltinOperator_PLACEHOLDER_FOR_GREATER_OP_CODES = 127
+  // BuiltinOperator_CUMSUM = 128
+  add_operator_code(127, "", tflite::BuiltinOperator_CUMSUM);
+  initialization_finish();
+
+  ASSERT_TRUE(mio::tflite::is_valid(get_operator_code(0)));
+  ASSERT_EQ(mio::tflite::builtin_code_neutral(get_operator_code(0)),
+            tflite::BuiltinOperator_CUMSUM);
+  ASSERT_FALSE(mio::tflite::is_custom(get_operator_code(0)));
+}
+
+TEST_F(mio_tflite2121_helper_test, v3a_over127_NEG)
+{
+  // BuiltinOperator_CUMSUM = 128
+  // deprecated_builtin_code cannot be negative value
+  add_operator_code(128, "", tflite::BuiltinOperator_CUMSUM);
+  initialization_finish();
+
+  ASSERT_FALSE(mio::tflite::is_valid(get_operator_code(0)));
+}