Split
Split text into multiple parts using a separator
ROT13 Encoder/Decoder
Encode or decode text using ROT13 cipher.
Text Tools
What Is ROT13?
ROT13 (rotate by 13 places) is a simple letter substitution cipher that replaces a letter with the 13th letter after it in the alphabet. ROT13 is a special case of the Caesar cipher which was developed in ancient Rome. Because there are 26 letters in the English alphabet, ROT13 is its own inverse; that is, to undo ROT13, the same algorithm is applied, so the same action can be used for encoding and decoding.
Input Text
ROT13 Result
ROT13 Encoder/Decoder Examples
ROT13 Encode
Encode a secret message using ROT13.
Input
Hello
Hello
Output
Uryyb
Uryyb
ROT13 Decode
ROT13 is its own inverse, so encoding also decodes.
Input
Uryyb
Uryyb
Output
Hello
Hello
ROT13 Full Sentence
Apply ROT13 to a complete sentence.
Input
The quick brown fox jumps over the lazy dog.
The quick brown fox jumps over the lazy dog.
Output
Gur dhvpx oebja sbk whzcf bire gur ynml qbt.
Gur dhvpx oebja sbk whzcf bire gur ynml qbt.
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