ROT13 / Caesar Cipher
ROT13 is just a Caesar cipher with shift 13 - running it twice undoes it.
ROT13 is just a Caesar cipher with shift 13 - running it twice undoes it.
Type or paste text, then click ROT13 for the classic shift-13 cipher, or set a custom shift amount and click Apply shift for any other Caesar cipher.
No - it offers zero real security and is trivial to reverse. It's a text-obfuscation convention (spoiler text, old forum posts), not a security tool.
Shifting by 13 twice is a shift of 26, a full loop back to the original letter, since the alphabet has 26 letters.
Any integer from -25 to 25 via the custom shift field, not just the standard ROT13 (13).
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