Vigenère Cipher

Encrypt and decrypt text using the Vigenère polyalphabetic cipher. Enter a key, paste your text, and see the cipher in action with a step-by-step visualization and the full Vigenère tableau. Fully client-side — nothing leaves your browser.

Key (letters only)

Only alphabetic characters are used. Non-letter characters pass through unchanged.

Input

Output

Vigenère Cipher

Step-by-step Visualization

Vigenère Tableau