Writing Room · Bench
Caesar / ROT13 Cipher
Shift-cipher encode & decode
Input
Output
Private by designThis bench runs within your browser. Supported files stay on this device while you work.
About this bench
About Caesar / ROT13 Cipher
Encode and decode text with the classic Caesar / ROT13 shift cipher — pick any shift amount to scramble or unscramble letters.
Input
Type or paste the text you want to inspect or transform; nothing is sent for remote processing.
Result
An immediate text result that can be reviewed and copied from the browser.
Limits
Meaning, tone and language-dependent results are mechanical aids. Review important writing before publishing or relying on it.
How to use Caesar / ROT13 Cipher
- 01Enter your text above.
- 02Choose the shift amount (13 for ROT13).
- 03Encode or decode.
- 04Copy the result.
Frequently asked questions
What is ROT13?
A simple letter-shift cipher that moves each letter 13 places; applying it twice returns the original text.
Is my text private?
Nothing is uploaded. This tool runs entirely in your browser, so your data is processed on your own device and never sent to a server.