ROT13 Cipher
Apply the ROT13 letter-rotation cipher — its own inverse.
How to Use
- Type text — the rotated version appears instantly.
- Apply ROT13 again to decode (it's symmetric).
Input
Output
Variants
ROT13
Letters rotated by 13 — own inverse
ROT5
Digits rotated by 5
ROT47
Full-ASCII — includes symbols
Security
None — strictly for obfuscation
Frequently Asked Questions
Is this secure?
No — ROT13 is obfuscation, not encryption. Letters shift by 13 so applying it twice returns the original.
Common Use Cases
Spoiler hiding
Classic Usenet convention for spoilers.
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