diff --git a/ext_data/excel2json.py b/ext_data/excel2json.py
new file mode 100644
index 0000000..cb85a6e
--- /dev/null
+++ b/ext_data/excel2json.py
@@ -0,0 +1,50 @@
+# -*- coding: utf-8 -*-
+import os
+import json
+import xlrd
+
+DATA_ROW_INDEX = 5
+DATA_COL_INDEX = 1
+TYPE_ROW_INDEX = 2
+NAME_ROW_INDEX = 4
+
+def convertSheet(sourceFile, sheet):
+    data = []
+    for m in range(DATA_ROW_INDEX, sheet.nrows):
+        item = {}
+        for n in range(DATA_COL_INDEX, sheet.ncols):
+            field_name = sheet.row_values(NAME_ROW_INDEX)[n]
+            field_type = sheet.row_values(TYPE_ROW_INDEX)[n]
+            field_value = sheet.row_values(m)[n]
+            item[field_name] = field_value
+            if field_type == 'int':
+                item[field_name] = int(field_value)
+            elif field_type == 'string':
+                item[field_name] = str(field_value)
+            else:
+                assert False
+            #print(field_name, type_name, field_value)
+        #end for n
+        data.append(item)
+    #end for m
+    jsondata = json.dumps(data, indent=4, separators=(',', ': '), ensure_ascii=False)
+    out_file = open("./" + sourceFile[:-5] + ".json", "w")
+    out_file.write(jsondata)
+    out_file.close()
+
+def convert(sourceFile):
+    if sourceFile != 'PlatformIds.xlsx':
+        return
+    print(sourceFile)
+    excel = xlrd.open_workbook(sourceFile)
+    for sheet in excel.sheets():
+        convertSheet(sourceFile, sheet)
+        break
+
+def main():
+    for file in os.listdir('./'):
+        if file[0] != '~' and (file[-5:] == '.xlsx' or file[-5:] == '.xlsx'):
+            convert(file)
+
+if __name__ == "__main__":
+    main()