diff --git a/tools/addprons.py b/tools/addprons.py
new file mode 100755
index 0000000..2d3f21a
--- /dev/null
+++ b/tools/addprons.py
@@ -0,0 +1,56 @@
+#!/usr/bin/env python3
+# -*- coding: UTF-8 -*-
+"""
+Add American English pronunciations and reformat the word list
+Usage: addprons.py <input_word_file> <output_word_file>
+"""
+import sys
+import os
+import re
+
+def main():
+    if len(sys.argv) != 3:
+        print(__doc__)
+        sys.exit(1)
+    input_file = sys.argv[1]
+    output_file = sys.argv[2]
+
+    if not os.path.isfile(input_file):
+        print("error: {} does not exist".format(input_file))
+        sys.exit(1)
+
+    if os.path.isfile(output_file):
+        print("{} exists. Override (y/n)?".format(output_file))
+        reply = input().strip().lower()
+        if reply[0] != 'y':
+            sys.exit(1)
+
+    # Add American Pronounciations to the word list one by one
+    with open(input_file, 'r') as in_fp, open(output_file, 'w') as out_fp:
+        for line in in_fp:
+            line = line.rstrip()
+            if re.search(r"\| 单词", line):
+                line = "| 单词 | 正确发音（英音）| 正确发音（美音）| 错误发音 |"
+            elif re.search(r"\| ----", line):
+                line = "| ---- | --------------- | ----------------- | ----------- | "
+            elif re.search(r'✅', line):
+                word = " "
+                britsh = " "
+                american = " "
+                fields = re.split(r'\|', line)
+                match = re.findall(r'[\w\-\s]+', fields[1])
+                if match:
+                    word = match[0]
+                pron = re.findall(r'\[🔊\]\(http.*\)', fields[1])
+                if pron:
+                    britsh = pron[0]
+                    american = britsh.replace("type=1", "type=2")
+                britsh = britsh + fields[2]
+                line = '|' + word + '| ' + britsh + '| ' + american + ' | ' +fields[3] + '|'
+            out_fp.write(line + '\n')
+            print(line)
+    in_fp.close()
+    out_fp.close()
+
+if __name__ == '__main__':
+    main()