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Cipher

Vigenère Cipher

Vigenère Cipher is a free online cipher that helps you encrypt or decrypt text with the classic Vigenère cipher using a keyword; runs entirely in your browser. Vigenère Cipher uses 3 input fields, returns 2 output values, and runs in your browser on the device.

Key facts

Inputs
3 fields: Text, Key, and Mode
Outputs
2 values: Result and Key used (letters)
Runtime
your browser on the device
Mode
Cipher
Privacy
Files and text stay in the browser session.
Cost
$0, no account required

How to use Vigenère Cipher

  1. 1

    Paste or fill in the input

    Enter your text or values into the input fields on the page.

  2. 2

    Run the utility

    Click Compute to run the utility in your browser and review the result.

  3. 3

    Copy the output

    Copy the output value you need from the result panel.

Vigenère Cipher details

First, enter Text in Vigenère Cipher. Next, review Result and Key used (letters). Additionally, Vigenère Cipher uses 3 input fields and 2 output blocks so the result is easy to scan and copy.

Encode or decode messages with the Vigenère cipher, a polyalphabetic substitution cipher that shifts each letter by a repeating keyword. Letters keep their case, and spaces, digits and punctuation pass straight through; the key only advances on actual letters. Pick encrypt or decrypt, supply a keyword (letters only are used), and get the transformed text plus the effective key. Vigenère Cipher runs locally; nothing is uploaded.

Common searches

  • vigenere cipher
  • vigenère cipher
  • vigenere encoder
  • vigenere decoder
  • encrypt vigenere
  • decrypt vigenere

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Frequently asked

What is Vigenère Cipher?

Vigenère Cipher is a free online cipher that helps you encrypt or decrypt text with the classic Vigenère cipher using a keyword; runs entirely in your browser. Vigenère Cipher uses 3 input fields, returns 2 output values, and runs in your browser on the device.

What inputs and outputs does Vigenère Cipher use?

Vigenère Cipher uses 3 input fields: Text, Key, and Mode. Vigenère Cipher returns 2 output values: Result and Key used (letters).

Do my files and data stay private?

Yes. Vigenère Cipher runs entirely in your browser using your device's CPU. Files and text are never uploaded to our servers, so your data stays private.

How do I use Vigenère Cipher?

Open Vigenère Cipher, paste or fill in the input fields, and the result updates instantly. Vigenère Cipher runs in your browser with no upload and no waiting.

Which browsers does Vigenère Cipher support?

Any modern browser works in Chrome, Firefox, Safari, and Edge on desktop and mobile. Vigenère Cipher uses standard web APIs and does not require any plugin, extension, or sign-up.