Encode or decode text with ROT13, ROT5, ROT18, ROT47 or a Caesar cipher with any shift, and try all 25 shifts to crack an unknown Caesar message.
About this tool
Encode or decode text with ROT13, ROT5, ROT18, ROT47 or any Caesar shift.
How to use ROT13 Encoder / Decoder
- Choose the cipher: ROT13, ROT5, ROT18, ROT47 or Caesar.
- Type or paste your text; the result appears instantly.
- For Caesar, set the shift, or click the readable line in the list of all 25 shifts.
Worked example
“Hello” in ROT13 is “Uryyb”, and applying ROT13 again gives “Hello” back. Puzzle forums use it to hide spoilers.
Is ROT13 encryption?
No. It is a simple letter substitution anyone can reverse, useful only for hiding spoilers and puzzle answers.
What is ROT47?
ROT47 rotates all printable ASCII characters, including digits and punctuation, by 47 places.
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