Vigenère Cipher Encoder & Decoder
Encode and decode text with the Vigenère polyalphabetic cipher online. Enter a keyword to encrypt or decrypt any message instantly, with an interactive Vigenère square.
Examples:
Plaintext
Ciphertext
Output will appear here
Frequently asked questions
What does Vigenère Cipher Encoder & Decoder do?
Encode and decode text with the Vigenère polyalphabetic cipher online. Enter a keyword to encrypt or decrypt any message instantly, with an interactive Vigenère square.
What should I check in the result?
Keep a copy of the original and compare the result. Check capitalization, accents, whitespace and line breaks because cleanup can discard information.