Encode and decode text with the Caesar cipher or ROT13 using any shift.
What is the Caesar Cipher & ROT13 tool?
The Caesar cipher is one of the oldest secret codes: each letter is shifted a fixed number of places in the alphabet. ROT13 is a Caesar cipher with a shift of 13, so the same step both encodes and decodes.
How to use the Caesar Cipher & ROT13 tool
- Type your message.
- Set the shift and choose Encode or Decode.
- Copy the result, or click ROT13.
Frequently asked questions
Is the Caesar cipher secure?
No. It can be cracked in seconds. Use it for puzzles and learning, not real secrets.
This caesar cipher & rot13 tool is 100% free, needs no signup and runs in your browser, so your data stays private.
Last updated: · By NodifyTech