Cipher — Caesar, ROT13, ROT47, Atbash & Vigenère
Encode and decode text with classic ciphers — Caesar (any shift), ROT13, ROT47, Atbash and Vigenère (with a keyword). Free, private, 100% in your browser.
Your ciphered text appears here…
🔒 Classical ciphers are teaching examples, not secure encryption — everything is processed in your browser and nothing is uploaded.
Classic ciphers in one tool
Encrypt or decrypt a message with a classic cipher: Caesar (shift letters by any amount), ROT13 (the fixed 13-shift), ROT47 (shifts printable ASCII), Atbash (mirror the alphabet, A↔Z), or the keyword-based Vigenère cipher. Pick a method, set the shift or key, and toggle between encode and decode. These are puzzle/education ciphers, not secure encryption — everything runs in your browser.
Frequently asked questions
Which ciphers are included?
Caesar (any shift), ROT13, ROT47, Atbash and Vigenère (keyword-based). Choose the method from the dropdown.
Is this secure encryption?
No — these are classical/educational ciphers meant for puzzles and learning, not for protecting sensitive data.
Is my text uploaded?
No. Encoding and decoding run entirely in your browser.