5 docs tagged with "Cipher"

Free online Atbash cipher tool. Reverses the alphabet (A↔Z, B↔Y). An ancient Hebrew cipher where encoding equals decoding.

Free online Bacon cipher encoder and decoder. Encodes letters as 5-bit A/B binary sequences. Invented by Francis Bacon for steganography.

Free online Caesar cipher encoder and decoder. Shift letters by a custom offset (1-25). Classic substitution cipher tool, runs locally to protect your privacy.

Free online Rail Fence cipher encoder and decoder. Classic transposition cipher with configurable rails (2-10). Runs locally to protect your privacy.

Free online Vigenère cipher encoder and decoder. Polyalphabetic substitution cipher with a custom key. Once called "the indecipherable cipher."