📄️ Caesar Cipher - Online Encoder & Decoder
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.
📄️ Morse Code - Online Encoder & Decoder
Free online Morse code translator. Convert text to Morse code and back, with audio playback. Supports letters, numbers, and punctuation.
📄️ Rail Fence Cipher - Online Encoder & Decoder
Free online Rail Fence cipher encoder and decoder. Classic transposition cipher with configurable rails (2-10). Runs locally to protect your privacy.
📄️ Vigenère Cipher - Online Encoder & Decoder
Free online Vigenère cipher encoder and decoder. Polyalphabetic substitution cipher with a custom key. Once called "the indecipherable cipher."
📄️ Atbash Cipher - Online Encoder & Decoder
Free online Atbash cipher tool. Reverses the alphabet (A↔Z, B↔Y). An ancient Hebrew cipher where encoding equals decoding.
📄️ ROT13 - Online Encoder & Decoder
Free online ROT13 encoder and decoder. Shifts letters by 13 positions — encoding equals decoding. Commonly used to hide spoilers and puzzle answers.
📄️ Bacon Cipher - Online Encoder & Decoder
Free online Bacon cipher encoder and decoder. Encodes letters as 5-bit A/B binary sequences. Invented by Francis Bacon for steganography.
📄️ Pigpen Cipher - Online Visual Encoder
Free online Pigpen cipher (Masonic cipher) generator. Converts English text into geometric symbols. Copy as image, runs locally.