EasyFilesConverter

Caesar cipher & ROT13

Encode and decode the Caesar cipher with any shift, ROT13, Atbash and Vigenère - or crack a Caesar message by showing all 25 shifts.

Cipher

Direction

Caesar shift

Vigenère key

Free · No sign-up · Your files are processed on your device and never uploaded

How to use Caesar cipher & ROT13

  1. Paste or type…
    1

    Paste or type

    Put your content in the box - or try the example.

  2. Result appears instantly
    2

    Watch the result

    The result updates as you type - choose options above if needed.

  3. TXTCopy / Download
    3

    Download the result

    Ready in seconds. Your file never left your device.

Features

  • Caesar, ROT13, Atbash and Vigenère.
  • Brute force: all 25 Caesar shifts at once.
  • Keeps upper/lower case and punctuation.

Free and private

Everything runs in your browser. The text you type or paste is never uploaded, logged or stored.

Questions

Is this secure encryption?

No - these are classic puzzles, broken in seconds. Use the AES text encryption tool for real secrets.

Is it free?

Yes - free and unlimited, with no sign-up and no watermark.

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