Overview: What is "Sub Cipher"?
Sub Cipher is an easy-to-use Encoder/Decoder app, which can encode or decode "simple substitution ciphers."
It works on the "Caesar" and "Atbash" style cipher methods, which are simple offset-alphabet ciphers. The well-known "Rot13" cipher is one of these.
Simply type or copy-paste your encoded or decoded text to and from e-mail, messages, social media, and it is immediately converted for you. Up to 2,000 characters can be converted at a time.
You can also capture the settings you have dialed in (as lines of text) to save in another document. This can be useful if you are publishing a newsletter or book of ciphers, and want to keep the settings you used with each cipher along with the cipher itself.
Caveat Emptor: These ancient styles of ciphers are very simple and easy to decode! This is simply a fun utility, and is not intended for serious "secret message" work.