Classic cipher converter
Explore 50 classic ciphers and text encodings with a free browser-only converter. Encode and decode locally; educational ciphers are not secure encryption.
Choose from Caesar shifts, Affine ciphers, Atbash, Vigenère, Morse code, and common text encodings. Your input is processed in the browser and is not sent or saved by this page.
Security note: Classical ciphers and encodings do not protect sensitive information. Do not use them for passwords or secrets.