Encode and decode text in ROT13 and ROT47
Encode and decode text with ROT13 or ROT47 (the operation is its own inverse), in your browser.
ROT13 shifts letters only; ROT47 also shifts digits and symbols. Applying the same mode again restores the original.
🔒 100% client-side — no data sent
Quickly encode or decode text with the ROT13 and ROT47 ciphers, directly online. These letter-shift algorithms hide content in a reversible way, without being real cryptographic protection. The conversion is 100% local in your browser.
What is it for?
- ▸ Hide a spoiler or answer in a forum or chat
- ▸ Solve puzzles and CTF challenges that use ROT13
- ▸ Lightly obfuscate text without strong encryption
- ▸ Decode a ROT13 or ROT47 message received online
FAQ
How does the ROT13 cipher work?
ROT13 shifts each letter of the alphabet by 13 positions, so applying the operation twice restores the original text. That's why the same tool is used for both encoding and decoding.
What is the difference between ROT13 and ROT47?
ROT13 only shifts alphabet letters, whereas ROT47 covers a wider range of ASCII characters, including digits and symbols. ROT47 therefore obfuscates more character types.
Is ROT13 a secure encryption?
No, ROT13 provides no real security because it is trivial to reverse and has no secret key. It only serves to lightly hide text, never to protect sensitive data.