8 docs tagged with "Crypto"

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 Morse code translator. Convert text to Morse code and back, with audio playback. Supports letters, numbers, and punctuation.

Free online Pigpen cipher (Masonic cipher) generator. Converts English text into geometric symbols. Copy as image, runs locally.

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

Free online ROT13 encoder and decoder. Shifts letters by 13 positions — encoding equals decoding. Commonly used to hide spoilers and puzzle answers.

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