Cipher Tools
The classic pen and paper ciphers, for puzzles, geocaching and escape rooms. None of these protect anything — they were all broken centuries ago.
Settings
Its own inverse, so encoding twice gives you the original back.
Letters only. It repeats across the message.
Direction
Message
Every Caesar shiftfor when you do not know the key
The line highlighted in green scores best against ordinary English letter frequencies. Tap a line to load it.