diff --git a/native/jni/NativeFileList.mk b/native/jni/NativeFileList.mk
index eb24df6..82237dc 100644
--- a/native/jni/NativeFileList.mk
+++ b/native/jni/NativeFileList.mk
@@ -15,6 +15,7 @@
 LATIN_IME_JNI_SRC_FILES := \
     com_android_inputmethod_keyboard_ProximityInfo.cpp \
     com_android_inputmethod_latin_BinaryDictionary.cpp \
+    com_android_inputmethod_latin_BinaryDictionaryUtils.cpp \
     com_android_inputmethod_latin_DicTraverseSession.cpp \
     jni_common.cpp
 
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
index bb54cbd..7a7816d 100644
--- a/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionary.cpp
@@ -27,8 +27,6 @@
 #include "suggest/core/dictionary/word_property.h"
 #include "suggest/core/suggest_options.h"
 #include "suggest/policyimpl/dictionary/structure/dictionary_structure_with_buffer_policy_factory.h"
-#include "suggest/policyimpl/dictionary/utils/dict_file_writing_utils.h"
-#include "utils/autocorrection_threshold_utils.h"
 #include "utils/char_utils.h"
 #include "utils/time_keeper.h"
 
@@ -36,49 +34,6 @@
 
 class ProximityInfo;
 
-// TODO: Move to makedict.
-static jboolean latinime_BinaryDictionary_createEmptyDictFile(JNIEnv *env, jclass clazz,
-        jstring filePath, jlong dictVersion, jstring locale, jobjectArray attributeKeyStringArray,
-        jobjectArray attributeValueStringArray) {
-    const jsize filePathUtf8Length = env->GetStringUTFLength(filePath);
-    char filePathChars[filePathUtf8Length + 1];
-    env->GetStringUTFRegion(filePath, 0, env->GetStringLength(filePath), filePathChars);
-    filePathChars[filePathUtf8Length] = '\0';
-    jsize localeLength = env->GetStringLength(locale);
-    jchar localeCodePoints[localeLength];
-    env->GetStringRegion(locale, 0, localeLength, localeCodePoints);
-    const int keyCount = env->GetArrayLength(attributeKeyStringArray);
-    const int valueCount = env->GetArrayLength(attributeValueStringArray);
-    if (keyCount != valueCount) {
-        return false;
-    }
-
-    DictionaryHeaderStructurePolicy::AttributeMap attributeMap;
-    for (int i = 0; i < keyCount; i++) {
-        jstring keyString = static_cast<jstring>(
-                env->GetObjectArrayElement(attributeKeyStringArray, i));
-        const jsize keyUtf8Length = env->GetStringUTFLength(keyString);
-        char keyChars[keyUtf8Length + 1];
-        env->GetStringUTFRegion(keyString, 0, env->GetStringLength(keyString), keyChars);
-        keyChars[keyUtf8Length] = '\0';
-        DictionaryHeaderStructurePolicy::AttributeMap::key_type key;
-        HeaderReadWriteUtils::insertCharactersIntoVector(keyChars, &key);
-
-        jstring valueString = static_cast<jstring>(
-                env->GetObjectArrayElement(attributeValueStringArray, i));
-        const jsize valueUtf8Length = env->GetStringUTFLength(valueString);
-        char valueChars[valueUtf8Length + 1];
-        env->GetStringUTFRegion(valueString, 0, env->GetStringLength(valueString), valueChars);
-        valueChars[valueUtf8Length] = '\0';
-        DictionaryHeaderStructurePolicy::AttributeMap::mapped_type value;
-        HeaderReadWriteUtils::insertCharactersIntoVector(valueChars, &value);
-        attributeMap[key] = value;
-    }
-
-    return DictFileWritingUtils::createEmptyDictFile(filePathChars, static_cast<int>(dictVersion),
-            CharUtils::convertShortArrayToIntVector(localeCodePoints, localeLength), &attributeMap);
-}
-
 static jlong latinime_BinaryDictionary_open(JNIEnv *env, jclass clazz, jstring sourceDir,
         jlong dictOffset, jlong dictSize, jboolean isUpdatable) {
     PROF_OPEN;
@@ -335,30 +290,6 @@
             outShortcutProbabilities);
 }
 
-static jfloat latinime_BinaryDictionary_calcNormalizedScore(JNIEnv *env, jclass clazz,
-        jintArray before, jintArray after, jint score) {
-    jsize beforeLength = env->GetArrayLength(before);
-    jsize afterLength = env->GetArrayLength(after);
-    int beforeCodePoints[beforeLength];
-    int afterCodePoints[afterLength];
-    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
-    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
-    return AutocorrectionThresholdUtils::calcNormalizedScore(beforeCodePoints, beforeLength,
-            afterCodePoints, afterLength, score);
-}
-
-static jint latinime_BinaryDictionary_editDistance(JNIEnv *env, jclass clazz, jintArray before,
-        jintArray after) {
-    jsize beforeLength = env->GetArrayLength(before);
-    jsize afterLength = env->GetArrayLength(after);
-    int beforeCodePoints[beforeLength];
-    int afterCodePoints[afterLength];
-    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
-    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
-    return AutocorrectionThresholdUtils::editDistance(beforeCodePoints, beforeLength,
-            afterCodePoints, afterLength);
-}
-
 static void latinime_BinaryDictionary_addUnigramWord(JNIEnv *env, jclass clazz, jlong dict,
         jintArray word, jint probability, jintArray shortcutTarget, jint shortuctProbability,
         jboolean isNotAWord, jboolean isBlacklisted, jint timestamp) {
@@ -518,17 +449,6 @@
     return env->NewStringUTF(resultChars);
 }
 
-static int latinime_BinaryDictionary_setCurrentTimeForTest(JNIEnv *env, jclass clazz,
-        jint currentTime) {
-    if (currentTime >= 0) {
-        TimeKeeper::startTestModeWithForceCurrentTime(currentTime);
-    } else {
-        TimeKeeper::stopTestMode();
-    }
-    TimeKeeper::setCurrentTime();
-    return TimeKeeper::peekCurrentTime();
-}
-
 static bool latinime_BinaryDictionary_isCorruptedNative(JNIEnv *env, jclass clazz, jlong dict) {
     Dictionary *dictionary = reinterpret_cast<Dictionary *>(dict);
     if (!dictionary) {
@@ -539,12 +459,6 @@
 
 static const JNINativeMethod sMethods[] = {
     {
-        const_cast<char *>("createEmptyDictFileNative"),
-        const_cast<char *>(
-                "(Ljava/lang/String;JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)Z"),
-        reinterpret_cast<void *>(latinime_BinaryDictionary_createEmptyDictFile)
-    },
-    {
         const_cast<char *>("openNative"),
         const_cast<char *>("(Ljava/lang/String;JJZ)J"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_open)
@@ -606,16 +520,6 @@
         reinterpret_cast<void *>(latinime_BinaryDictionary_getNextWord)
     },
     {
-        const_cast<char *>("calcNormalizedScoreNative"),
-        const_cast<char *>("([I[II)F"),
-        reinterpret_cast<void *>(latinime_BinaryDictionary_calcNormalizedScore)
-    },
-    {
-        const_cast<char *>("editDistanceNative"),
-        const_cast<char *>("([I[I)I"),
-        reinterpret_cast<void *>(latinime_BinaryDictionary_editDistance)
-    },
-    {
         const_cast<char *>("addUnigramWordNative"),
         const_cast<char *>("(J[II[IIZZI)V"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_addUnigramWord)
@@ -642,11 +546,6 @@
         reinterpret_cast<void *>(latinime_BinaryDictionary_calculateProbabilityNative)
     },
     {
-        const_cast<char *>("setCurrentTimeForTestNative"),
-        const_cast<char *>("(I)I"),
-        reinterpret_cast<void *>(latinime_BinaryDictionary_setCurrentTimeForTest)
-    },
-    {
         const_cast<char *>("getPropertyNative"),
         const_cast<char *>("(JLjava/lang/String;)Ljava/lang/String;"),
         reinterpret_cast<void *>(latinime_BinaryDictionary_getProperty)
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp
new file mode 100644
index 0000000..64034e7
--- /dev/null
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.cpp
@@ -0,0 +1,136 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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.
+ */
+
+#define LOG_TAG "LatinIME: jni: BinaryDictionaryUtils"
+
+#include "com_android_inputmethod_latin_BinaryDictionaryUtils.h"
+
+#include "defines.h"
+#include "jni.h"
+#include "jni_common.h"
+#include "suggest/policyimpl/dictionary/utils/dict_file_writing_utils.h"
+#include "utils/autocorrection_threshold_utils.h"
+#include "utils/char_utils.h"
+#include "utils/time_keeper.h"
+
+namespace latinime {
+
+static jboolean latinime_BinaryDictionaryUtils_createEmptyDictFile(JNIEnv *env, jclass clazz,
+        jstring filePath, jlong dictVersion, jstring locale, jobjectArray attributeKeyStringArray,
+        jobjectArray attributeValueStringArray) {
+    const jsize filePathUtf8Length = env->GetStringUTFLength(filePath);
+    char filePathChars[filePathUtf8Length + 1];
+    env->GetStringUTFRegion(filePath, 0, env->GetStringLength(filePath), filePathChars);
+    filePathChars[filePathUtf8Length] = '\0';
+    jsize localeLength = env->GetStringLength(locale);
+    jchar localeCodePoints[localeLength];
+    env->GetStringRegion(locale, 0, localeLength, localeCodePoints);
+    const int keyCount = env->GetArrayLength(attributeKeyStringArray);
+    const int valueCount = env->GetArrayLength(attributeValueStringArray);
+    if (keyCount != valueCount) {
+        return false;
+    }
+
+    DictionaryHeaderStructurePolicy::AttributeMap attributeMap;
+    for (int i = 0; i < keyCount; i++) {
+        jstring keyString = static_cast<jstring>(
+                env->GetObjectArrayElement(attributeKeyStringArray, i));
+        const jsize keyUtf8Length = env->GetStringUTFLength(keyString);
+        char keyChars[keyUtf8Length + 1];
+        env->GetStringUTFRegion(keyString, 0, env->GetStringLength(keyString), keyChars);
+        keyChars[keyUtf8Length] = '\0';
+        DictionaryHeaderStructurePolicy::AttributeMap::key_type key;
+        HeaderReadWriteUtils::insertCharactersIntoVector(keyChars, &key);
+
+        jstring valueString = static_cast<jstring>(
+                env->GetObjectArrayElement(attributeValueStringArray, i));
+        const jsize valueUtf8Length = env->GetStringUTFLength(valueString);
+        char valueChars[valueUtf8Length + 1];
+        env->GetStringUTFRegion(valueString, 0, env->GetStringLength(valueString), valueChars);
+        valueChars[valueUtf8Length] = '\0';
+        DictionaryHeaderStructurePolicy::AttributeMap::mapped_type value;
+        HeaderReadWriteUtils::insertCharactersIntoVector(valueChars, &value);
+        attributeMap[key] = value;
+    }
+
+    return DictFileWritingUtils::createEmptyDictFile(filePathChars, static_cast<int>(dictVersion),
+            CharUtils::convertShortArrayToIntVector(localeCodePoints, localeLength), &attributeMap);
+}
+
+static jfloat latinime_BinaryDictionaryUtils_calcNormalizedScore(JNIEnv *env, jclass clazz,
+        jintArray before, jintArray after, jint score) {
+    jsize beforeLength = env->GetArrayLength(before);
+    jsize afterLength = env->GetArrayLength(after);
+    int beforeCodePoints[beforeLength];
+    int afterCodePoints[afterLength];
+    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
+    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
+    return AutocorrectionThresholdUtils::calcNormalizedScore(beforeCodePoints, beforeLength,
+            afterCodePoints, afterLength, score);
+}
+
+static jint latinime_BinaryDictionaryUtils_editDistance(JNIEnv *env, jclass clazz, jintArray before,
+        jintArray after) {
+    jsize beforeLength = env->GetArrayLength(before);
+    jsize afterLength = env->GetArrayLength(after);
+    int beforeCodePoints[beforeLength];
+    int afterCodePoints[afterLength];
+    env->GetIntArrayRegion(before, 0, beforeLength, beforeCodePoints);
+    env->GetIntArrayRegion(after, 0, afterLength, afterCodePoints);
+    return AutocorrectionThresholdUtils::editDistance(beforeCodePoints, beforeLength,
+            afterCodePoints, afterLength);
+}
+
+static int latinime_BinaryDictionaryUtils_setCurrentTimeForTest(JNIEnv *env, jclass clazz,
+        jint currentTime) {
+    if (currentTime >= 0) {
+        TimeKeeper::startTestModeWithForceCurrentTime(currentTime);
+    } else {
+        TimeKeeper::stopTestMode();
+    }
+    TimeKeeper::setCurrentTime();
+    return TimeKeeper::peekCurrentTime();
+}
+
+static const JNINativeMethod sMethods[] = {
+    {
+        const_cast<char *>("createEmptyDictFileNative"),
+        const_cast<char *>(
+                "(Ljava/lang/String;JLjava/lang/String;[Ljava/lang/String;[Ljava/lang/String;)Z"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_createEmptyDictFile)
+    },
+    {
+        const_cast<char *>("calcNormalizedScoreNative"),
+        const_cast<char *>("([I[II)F"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_calcNormalizedScore)
+    },
+    {
+        const_cast<char *>("editDistanceNative"),
+        const_cast<char *>("([I[I)I"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_editDistance)
+    },
+    {
+        const_cast<char *>("setCurrentTimeForTestNative"),
+        const_cast<char *>("(I)I"),
+        reinterpret_cast<void *>(latinime_BinaryDictionaryUtils_setCurrentTimeForTest)
+    }
+};
+
+int register_BinaryDictionaryUtils(JNIEnv *env) {
+    const char *const kClassPathName = "com/android/inputmethod/latin/BinaryDictionary";
+    return registerNativeMethods(env, kClassPathName, sMethods, NELEMS(sMethods));
+}
+} // namespace latinime
diff --git a/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.h b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.h
new file mode 100644
index 0000000..38edcd2
--- /dev/null
+++ b/native/jni/com_android_inputmethod_latin_BinaryDictionaryUtils.h
@@ -0,0 +1,25 @@
+/*
+ * Copyright (C) 2014 The Android Open Source Project
+ *
+ * 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 _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARYUTILS_H
+#define _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARYUTILS_H
+
+#include "jni.h"
+
+namespace latinime {
+int register_BinaryDictionaryUtils(JNIEnv *env);
+} // namespace latinime
+#endif // _COM_ANDROID_INPUTMETHOD_LATIN_BINARYDICTIONARYUTILS_H
diff --git a/native/jni/jni_common.cpp b/native/jni/jni_common.cpp
index f2867d7..9fa7ef8 100644
--- a/native/jni/jni_common.cpp
+++ b/native/jni/jni_common.cpp
@@ -20,6 +20,7 @@
 
 #include "com_android_inputmethod_keyboard_ProximityInfo.h"
 #include "com_android_inputmethod_latin_BinaryDictionary.h"
+#include "com_android_inputmethod_latin_BinaryDictionaryUtils.h"
 #include "com_android_inputmethod_latin_DicTraverseSession.h"
 #include "defines.h"
 
@@ -42,6 +43,10 @@
         AKLOGE("ERROR: BinaryDictionary native registration failed");
         return -1;
     }
+    if (!latinime::register_BinaryDictionaryUtils(env)) {
+        AKLOGE("ERROR: BinaryDictionaryUtils native registration failed");
+        return -1;
+    }
     if (!latinime::register_DicTraverseSession(env)) {
         AKLOGE("ERROR: DicTraverseSession native registration failed");
         return -1;