Rot 13 encoder/decoder

Enter text in the top box and press the button to see it transformed into "rot 13" code. Rot 13 code is the mapping of characters from a to n, b to o, ... m to z, n to a, o to b, etc. In other words, count 13 letters up to get the code. Wrap at Z. Because of the nature of the encoding (13 is 1/2 of the alphabet), applying the encoding a second time will decode the text.

Why use rot 13?

There are many reasons to use rot 13. The number one reason would be to:

1. Encode profane, obscene, or objectionable passages. Anyone willing to decode it is, in effect, asking to be possibly offended.
2. Encode the answer to a question, puzzle, or riddle. The person viewing the item will not easily recognize the answer until it is decoded.

When to NOT use rot 13

Rot 13 is not really encryption. Anyone can easily "break" the code by using a "decoder ring". It also only works on the alphabet, and not numbers. So DO NOT use rot 13 on:

1. Any number you want to remain unknown (SS, phone, credit card...)
2. Any private or secret information
3. Any profane or obscene information on a "kids only" forum. The kids will eventually figure out what it was you didn't want them to see.