How to Make Invisible Ink for Writing Top-Secret Messages
Create your own top-secret invisible messages with this simple technique.
Codes and Ciphers
Learn Morse Code With This Morse Translator and Decoder
Use this helpful tool to translate between morse code and text.
How to Build a Secret-Code Wheel
Writing secret messages is easy with this cipher wheel. It scrambles the alphabet so nobody can read your message.
Multi-code Machine
Learn many forms of communication including basic sign language, braille, semiphores, and more.
Codemaster: Code Maker
Create your own secret encoded messages that you can print and give to friends to decode.