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iTextKitTools

ROT13 Encoder & Decoder

ROT13 shifts every letter 13 places in the alphabet. Because 13 is half of 26, the same operation both encodes and decodes — run your text through once to encrypt, again to reveal it.

Result

The result will appear here…

How to use the ROT13 Decoder

  1. 1Type your text above.
  2. 2The ROT13 result appears instantly.
  3. 3Run the result through again to decode.

Why ROT13 is its own inverse

ROT13 shifts each letter 13 places. Because the alphabet has 26 letters and 13 is exactly half, applying ROT13 twice returns the original text — so the same button both encodes and decodes. It’s commonly used online to hide spoilers and puzzle answers, not for real security.

Frequently asked questions

Is ROT13 secure?+

No — ROT13 is not encryption for security. It is used to lightly obscure spoilers, puzzle answers and similar content.