TTULAKITO
Writer

ROT13 Caesar Cipher

Encode and decode text with ROT13 and Caesar shift ciphers.

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Cipher

Uryyb, jbeyq!

Frequently asked questions

What is the difference between ROT13 and a Caesar cipher?
ROT13 is a Caesar cipher with a fixed shift of 13, which conveniently makes encoding and decoding the same operation. A generic Caesar cipher can use any shift from 1 to 25.
Is ROT13 secure for hiding sensitive text?
No. ROT13 is meant to lightly obscure spoilers, puzzle answers, or punchlines, not to protect real secrets. Anyone can decode it in seconds, so use real encryption for sensitive data.
Does the cipher affect numbers and punctuation?
Only letters are shifted; digits, spaces, and punctuation pass through unchanged. Case is preserved so uppercase stays uppercase and lowercase stays lowercase after the shift.