Update README.md

Author: mifth

README.md

@@ -1,3 +1,9 @@
 # Simple-Python-Encoder-Decoder
 
+To create your own exe file for Windows:
+```
+pip install pyinstaller
+pyinstaller --onefile cc:/your_path/simple_encoder_decoder.py
+```
+
 <img width="627" height="388" alt="image" src="https://github.com/user-attachments/assets/77e5cd70-b50d-47b1-b278-9769f020d925" />