MCipher: Encrypt & Decrypt

MCipher turns text into secret code and back again. Pick a method, type your message, and see the result instantly — then copy it, share it or save it for later. 12 ways to encode text • Classic ciphers: Caesar, Vigenère, Affine, Atbash, ROT13, Rail Fence • Modern encryption: AES with your own key • Encodings: Base64, Binary, ASCII, Morse code • Set your own shift, key or rails for every method Tools for cipher puzzles • Cipher cracker: try every key on Caesar, Affine or Rail Fence text and see the most likely answers first • Frequency analysis: letter counts and index of coincidence • Hash & checksum: MD5, SHA-1, SHA-256, SHA-384, SHA-512, CRC-32 and HMAC, plus hash verification • Morse audio: listen to your text in Morse or save it as a WAV file • Modulo calculator and prime number tools Learn how ciphers work Step-by-step visual lessons on Caesar, Vigenère, Affine, Rail Fence and Atbash, plus a demo of the avalanche effect in modern hashing. Your data stays on your phone • Save the conversions you want to keep • Lock the app with your fingerprint, face or screen lock • Saved conversions are never included in cloud backups Made to be comfortable • Light and dark themes • Layouts for phones and tablets • English, Arabic and Turkish Classic ciphers are great for puzzles, games, CTFs and learning, but they aren't strong security. For anything sensitive, use AES with a strong key. Found a bug or have an idea? Email me — I read everything.