diff --git a/pythonetc/README.md b/pythonetc/README.md
index c90e6b2..4542412 100644
--- a/pythonetc/README.md
+++ b/pythonetc/README.md
@@ -57,3 +57,4 @@ More:
 1. ./sentinel.md                (20 October 2020, 18:00)
 1. ./yield-compr.md             (22 October 2020, 18:00)
 1. ./f-docstrings.md            (27 October 2020, 18:00)
+1. ./codecs.md                  (29 October 2020, 18:00)
diff --git a/pythonetc/codecs.md b/pythonetc/codecs.md
new file mode 100644
index 0000000..155059d
--- /dev/null
+++ b/pythonetc/codecs.md
@@ -0,0 +1,18 @@
+The module [codecs](https://docs.python.org/3/library/codecs.html) provides `encode` and `decode` function to encode and decode (wow!) text in different encodings, like UTF8, CP1251, [Punycode](https://en.wikipedia.org/wiki/Punycode), [IDNA](https://en.wikipedia.org/wiki/Internationalized_domain_name), [ROT13](https://en.wikipedia.org/wiki/ROT13), execute [escape sequences](https://en.wikipedia.org/wiki/Escape_sequence), etc.
+
+```python
+codecs.encode('hello, @pythonetc', 'rot13')
+# 'uryyb, @clgubargp'
+
+codecs.encode('\n', 'unicode_escape')
+# b'\\n'
+
+codecs.encode('привет, @pythonetc', 'punycode')
+# b', @pythonetc-nbk5b4b7gra3b'
+
+codecs.encode('привет, @pythonetc', 'idna')
+# b'xn--, @pythonetc-nbk5b4b7gra3b'
+
+codecs.encode('привет, @pythonetc', 'cp1251')
+# b'\xef\xf0\xe8\xe2\xe5\xf2, @pythonetc'
+```