diff --git a/Basis/Functions.py b/Basis/Functions.py
index 829cf1d..7297183 100644
--- a/Basis/Functions.py
+++ b/Basis/Functions.py
@@ -4,12 +4,10 @@
 import re
 import time
 import uuid
-import base64
 import psutil
 import random
 import hashlib
 from IPy import IP
-import urllib.parse
 from Basis.Logger import logging
 
 
@@ -113,34 +111,6 @@ def toBool(raw) -> bool:
         raise RuntimeError('Unable convert to bool')
 
 
-def urlEncode(content: str) -> str:
-    return urllib.parse.urlencode(content)
-
-
-def urlDecode(content: str) -> str:
-    return urllib.parse.unquote(content)
-
-
-def base64Encode(content: str, urlSafe: bool = False, isPadding: bool = True) -> str:
-    content = base64.b64encode(content.encode(encoding = 'utf-8')).decode(encoding = 'utf-8')
-    if urlSafe:
-        content = content.replace('+', '-')
-        content = content.replace('/', '_')
-    if not isPadding:
-        content = content.replace('=', '')
-    return content
-
-
-def base64Decode(content: str) -> str or None:
-    try:
-        content = content.replace('-', '+').replace('_', '/')
-        if len(content) % 4 in range(2, 4):  # remainder -> 2 or 3
-            content = content.ljust((len(content) // 4 + 1) * 4, '=')  # increase to 4n
-        return base64.b64decode(content).decode(encoding = 'utf-8')
-    except:
-        raise RuntimeError('Invalid base64 encode')
-
-
 def getAvailablePort(rangeStart: int = 1024, rangeEnd: int = 65535, waitTime: int = 10) -> int:  # get available port
     if rangeStart > rangeEnd or rangeStart < 1 or rangeEnd > 65535:
         raise RuntimeError('Invalid port range')
diff --git a/Utils/Common/Coding.py b/Utils/Common/Coding.py
new file mode 100644
index 0000000..670e147
--- /dev/null
+++ b/Utils/Common/Coding.py
@@ -0,0 +1,32 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+import base64
+import urllib.parse
+
+def urlEncode(content: str) -> str:  # url encode (RFC3986)
+    return urllib.parse.quote(content, encoding = 'utf-8')
+
+
+def urlDecode(content: str) -> str:  # url decode (RFC3986)
+    return urllib.parse.unquote(content, encoding = 'utf-8')
+
+
+def base64Encode(content: str, urlSafe: bool = True, padding: bool = False) -> str:  # base64 encode
+    content = base64.b64encode(content.encode(encoding = 'utf-8')).decode(encoding = 'utf-8')
+    if urlSafe:
+        content = content.replace('+', '-')  # `+` => `-`
+        content = content.replace('/', '_')  # `/` => `_`
+    if padding:
+        return content
+    return content.replace('=', '')  # remove `=` padding
+
+
+def base64Decode(content: str) -> str:  # base64 decode
+    try:
+        content = content.replace('-', '+').replace('_', '/')  # compatible urlSafe
+        if len(content) % 4 in range(2, 4):  # remainder -> 2 or 3
+            content = content.ljust((len(content) // 4 + 1) * 4, '=')  # increase to 4n
+        return base64.b64decode(content).decode(encoding = 'utf-8')
+    except:
+        raise RuntimeError('Invalid base64 encode')
diff --git a/Utils/Common/__init__.py b/Utils/Common/__init__.py
new file mode 100644
index 0000000..3730331
--- /dev/null
+++ b/Utils/Common/__init__.py
@@ -0,0 +1,5 @@
+#!/usr/bin/env python3
+# -*- coding: utf-8 -*-
+
+from Utils.Common.Coding import urlEncode, urlDecode
+from Utils.Common.Coding import base64Encode, base64Decode