diff --git a/native/jni/Android.mk b/native/jni/Android.mk
index a0c1c68..6e1d765 100644
--- a/native/jni/Android.mk
+++ b/native/jni/Android.mk
@@ -53,9 +53,7 @@
         dic_nodes_cache.cpp) \
     $(addprefix suggest/core/dictionary/, \
         bigram_dictionary.cpp \
-        binary_dictionary_format_utils.cpp \
         bloom_filter.cpp \
-        byte_array_utils.cpp \
         dictionary.cpp \
         digraph_utils.cpp \
         multi_bigram_map.cpp) \
@@ -72,6 +70,8 @@
         header/header_policy.cpp \
         header/header_reading_utils.cpp \
         shortcut/shortcut_list_reading_utils.cpp \
+        utils/byte_array_utils.cpp \
+        utils/format_utils.cpp \
         dictionary_structure_with_buffer_policy_factory.cpp \
         dynamic_patricia_trie_node_reader.cpp \
         dynamic_patricia_trie_policy.cpp \
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index 8b46c26..a25cef5 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -27,10 +27,10 @@
 #include "defines.h"
 #include "jni.h"
 #include "jni_common.h"
-#include "suggest/core/dictionary/binary_dictionary_format_utils.h"
 #include "suggest/core/dictionary/binary_dictionary_info.h"
 #include "suggest/core/dictionary/dictionary.h"
 #include "suggest/core/suggest_options.h"
+#include "suggest/policyimpl/dictionary/utils/format_utils.h"
 #include "utils/autocorrection_threshold_utils.h"
 
 namespace latinime {
@@ -87,8 +87,8 @@
         return 0;
     }
     Dictionary *dictionary = 0;
-    if (BinaryDictionaryFormatUtils::UNKNOWN_VERSION
-            == BinaryDictionaryFormatUtils::detectFormatVersion(static_cast<uint8_t *>(dictBuf),
+    if (FormatUtils::UNKNOWN_VERSION
+            == FormatUtils::detectFormatVersion(static_cast<uint8_t *>(dictBuf),
                     static_cast<int>(dictSize))) {
         AKLOGE("DICT: dictionary format is unknown, bad magic number");
         releaseDictBuf(static_cast<const char *>(dictBuf) - offset, adjDictSize, fd);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.cpp
index 6f4fcbf..6da0e8b 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.cpp
@@ -16,7 +16,7 @@
 
 #include "suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.h"
 
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.h b/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.h
index 6b2bfe8..d0c584b 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/bigram/bigram_list_reading_utils.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp
index 3054e4e..34f092f 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/dictionary_structure_with_buffer_policy_factory.cpp
@@ -19,19 +19,19 @@
 #include <stdint.h>
 
 #include "defines.h"
-#include "suggest/core/dictionary/binary_dictionary_format_utils.h"
 #include "suggest/policyimpl/dictionary/dynamic_patricia_trie_policy.h"
 #include "suggest/policyimpl/dictionary/patricia_trie_policy.h"
+#include "suggest/policyimpl/dictionary/utils/format_utils.h"
 
 namespace latinime {
 
 /* static */ DictionaryStructureWithBufferPolicy *DictionaryStructureWithBufferPolicyFactory
         ::newDictionaryStructureWithBufferPolicy(const uint8_t *const dictBuf,
                 const int dictSize) {
-    switch (BinaryDictionaryFormatUtils::detectFormatVersion(dictBuf, dictSize)) {
-        case BinaryDictionaryFormatUtils::VERSION_2:
+    switch (FormatUtils::detectFormatVersion(dictBuf, dictSize)) {
+        case FormatUtils::VERSION_2:
             return new PatriciaTriePolicy(dictBuf);
-        case BinaryDictionaryFormatUtils::VERSION_3:
+        case FormatUtils::VERSION_3:
             return new DynamicPatriciaTriePolicy(dictBuf);
         default:
             ASSERT(false);
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.cpp
index 0de6341..1ef3b65 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.cpp
@@ -17,7 +17,7 @@
 #include "suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.h"
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.h b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.h
index 5398d7e..a6cb46d 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/dynamic_patricia_trie_reading_utils.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/header/header_reading_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/header/header_reading_utils.cpp
index 70f45df..23b88ec 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/header/header_reading_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/header/header_reading_utils.cpp
@@ -20,7 +20,7 @@
 #include <cstdlib>
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.cpp
index 89e981d..003b943 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.cpp
@@ -17,7 +17,7 @@
 #include "suggest/policyimpl/dictionary/patricia_trie_reading_utils.h"
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.h b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.h
index 002c3f1..9f2fc20 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/patricia_trie_reading_utils.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/policyimpl/dictionary/shortcut/shortcut_list_reading_utils.h b/native/jni/src/suggest/policyimpl/dictionary/shortcut/shortcut_list_reading_utils.h
index e92fa5f..b5bb964 100644
--- a/native/jni/src/suggest/policyimpl/dictionary/shortcut/shortcut_list_reading_utils.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/shortcut/shortcut_list_reading_utils.h
@@ -20,7 +20,7 @@
 #include <stdint.h>
 
 #include "defines.h"
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dictionary/byte_array_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/utils/byte_array_utils.cpp
similarity index 92%
rename from native/jni/src/suggest/core/dictionary/byte_array_utils.cpp
rename to native/jni/src/suggest/policyimpl/dictionary/utils/byte_array_utils.cpp
index 68b1d5d..a84cfb9 100644
--- a/native/jni/src/suggest/core/dictionary/byte_array_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/utils/byte_array_utils.cpp
@@ -14,7 +14,7 @@
  * limitations under the License.
  */
 
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
diff --git a/native/jni/src/suggest/core/dictionary/byte_array_utils.h b/native/jni/src/suggest/policyimpl/dictionary/utils/byte_array_utils.h
similarity index 100%
rename from native/jni/src/suggest/core/dictionary/byte_array_utils.h
rename to native/jni/src/suggest/policyimpl/dictionary/utils/byte_array_utils.h
diff --git a/native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.cpp b/native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.cpp
similarity index 73%
rename from native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.cpp
rename to native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.cpp
index 15f2aa6..3796c7b 100644
--- a/native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.cpp
+++ b/native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.cpp
@@ -14,9 +14,9 @@
  * limitations under the License.
  */
 
-#include "suggest/core/dictionary/binary_dictionary_format_utils.h"
+#include "suggest/policyimpl/dictionary/utils/format_utils.h"
 
-#include "suggest/core/dictionary/byte_array_utils.h"
+#include "suggest/policyimpl/dictionary/utils/byte_array_utils.h"
 
 namespace latinime {
 
@@ -24,21 +24,19 @@
  * Dictionary size
  */
 // Any file smaller than this is not a dictionary.
-const int BinaryDictionaryFormatUtils::DICTIONARY_MINIMUM_SIZE = 4;
+const int FormatUtils::DICTIONARY_MINIMUM_SIZE = 4;
 
 /**
  * Format versions
  */
-// The versions of Latin IME that only handle format version 1 only test for the magic
-// number, so we had to change it so that version 2 files would be rejected by older
-// implementations. On this occasion, we made the magic number 32 bits long.
-const uint32_t BinaryDictionaryFormatUtils::HEADER_VERSION_2_MAGIC_NUMBER = 0x9BC13AFE;
+// 32 bit magic number is stored at the beginning of the dictionary header to reject unsupported
+// or obsolete dictionary formats.
+const uint32_t FormatUtils::HEADER_VERSION_2_MAGIC_NUMBER = 0x9BC13AFE;
 // Magic number (4 bytes), version (2 bytes), options (2 bytes), header size (4 bytes) = 12
-const int BinaryDictionaryFormatUtils::HEADER_VERSION_2_MINIMUM_SIZE = 12;
+const int FormatUtils::HEADER_VERSION_2_MINIMUM_SIZE = 12;
 
-/* static */ BinaryDictionaryFormatUtils::FORMAT_VERSION
-        BinaryDictionaryFormatUtils::detectFormatVersion(const uint8_t *const dict,
-                const int dictSize) {
+/* static */ FormatUtils::FORMAT_VERSION FormatUtils::detectFormatVersion(
+        const uint8_t *const dict, const int dictSize) {
     // The magic number is stored big-endian.
     // If the dictionary is less than 4 bytes, we can't even read the magic number, so we don't
     // understand this format.
diff --git a/native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.h b/native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.h
similarity index 69%
rename from native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.h
rename to native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.h
index 62c7376..f843215 100644
--- a/native/jni/src/suggest/core/dictionary/binary_dictionary_format_utils.h
+++ b/native/jni/src/suggest/policyimpl/dictionary/utils/format_utils.h
@@ -14,8 +14,8 @@
  * limitations under the License.
  */
 
-#ifndef LATINIME_BINARY_DICTIONARY_FORMAT_UTILS_H
-#define LATINIME_BINARY_DICTIONARY_FORMAT_UTILS_H
+#ifndef LATINIME_FORMAT_UTILS_H
+#define LATINIME_FORMAT_UTILS_H
 
 #include <stdint.h>
 
@@ -25,12 +25,8 @@
 
 /**
  * Methods to handle binary dictionary format version.
- *
- * Currently, we have a file with a similar name, binary_format.h. binary_format.h contains binary
- * reading methods and utility methods for various purposes.
- * On the other hand, this file deals with only about dictionary format version.
  */
-class BinaryDictionaryFormatUtils {
+class FormatUtils {
  public:
     enum FORMAT_VERSION {
         VERSION_2,
@@ -41,11 +37,11 @@
     static FORMAT_VERSION detectFormatVersion(const uint8_t *const dict, const int dictSize);
 
  private:
-    DISALLOW_IMPLICIT_CONSTRUCTORS(BinaryDictionaryFormatUtils);
+    DISALLOW_IMPLICIT_CONSTRUCTORS(FormatUtils);
 
     static const int DICTIONARY_MINIMUM_SIZE;
     static const uint32_t HEADER_VERSION_2_MAGIC_NUMBER;
     static const int HEADER_VERSION_2_MINIMUM_SIZE;
 };
 } // namespace latinime
-#endif /* LATINIME_BINARY_DICTIONARY_FORMAT_UTILS_H */
+#endif /* LATINIME_FORMAT_UTILS_H */