World's simplest text tool
World's simplest browser-based utility for converting text to rot13. Load your text in the input form on the left and you'll instantly get rot13 in the output area. Powerful, free, and fast. Load text – get rot13(text). Created by developers from team Browserling.
Rot13 converter tool What is a rot13 converter?
With this tool, you can encode or decode the given text to and from ROT13 encoding. It replaces each letter in the text by another letter that's 13 alphabetic positions away from it. The first letter of the alphabet (a) is replaced with the thirteenth letter (m), the second (b) with the fourteenth (n), and so on. Once the count goes past the last letter (z), it starts at the first letter of alphabet again (a). Also a fun fact – because the English alphabet has 26 letters and 13+13=26, this algorithm is inverse of itself (applying it twice to the text, we get the same text). Textabulous!
Rot13 converter examples Click to use
Hide a Message Using ROT-13
In this example, we apply ROT-13 algorithm to a message about aliens to hide it from a casual reader.
An alien spacecraft within two spans.
Na nyvra fcnprpensg jvguva gjb fcnaf.
Reveal Text with ROT-13
In this example, we reveal a previously hidden text using ROT13 by applying the same algorithm to it (since it works both ways).
Qb abg ernq gur arkg fragrapr. Lbh yvggyr erory, V yvxr lbh!
Do not read the next sentence. You little rebel, I like you!
Pro tips Master online text tools
You can pass input to this tool via ?input query argument and it will automatically compute output. Here's how to type it in your browser's address bar. Click to try!
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Count the number of letters in text.
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Sort all characters in text alphabetically.
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Analyze text for most frequent letters, words, phrases, sentences and paragraphs.
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Add a number before every line in text.
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