# Rot13 encoder

World's simplest crypto tool
This browser-based utility applies the ROT13 encryption algorithm to your input data. All characters in the input text get shifted by 13 characters and you get a ROT13-encoded text in the output. Don't use this tool for anything serious as ROT13 is very easy to break. Created by cryptonerds from team Browserling.

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## What is a rot13 encoder?

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This online utility encodes text using the ROT13 cipher. This cipher is a special case of the Caesar shift cipher that was developed in ancient Rome. It's a substitution cipher in which each letter in the plaintext is replaced by a letter some fixed number of positions down the alphabet. In ROT13, each character is replaced by a character 13 positions to the left. For example, A becomes N, B becomes O, and so on. The method is named after Julius Caesar, who used it in his private correspondence.

## Rot13 encoder examples

Click to useHide the Solution

In this example, we encrypt the solution to a puzzle via the ROT13 algorithm. It's useful if you want to share it on game forums but don't want people to immediately read the solution and spoil their joy of solving the puzzle.

In the room where you find the warlock's spirit there are five pushable bricks hidden in the walls. To unlock the spirit, push the third brick twice, then second brick five times and the fifth block once.

Va gur ebbz jurer lbh svaq gur jneybpx'f fcvevg gurer ner svir chfunoyr oevpxf uvqqra va gur jnyyf. Gb haybpx gur fcvevg, chfu gur guveq oevpx gjvpr, gura frpbaq oevpx svir gvzrf naq gur svsgu oybpx bapr.

Don't Use It On Digits!

This example demonstrates that ROT13 cypher doesn't work on digits. This is because it only operates on the letters of the English alphabet. As you can see, the time of the secret meeting was left un-encrypted and visible to everyone.

Secret meeting at 12:25!

Frperg zrrgvat ng 12:25!

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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!
https://onlinecryptotools.com/rot13-encrypt-data

__?input__=In%20the%20room%20where%20you%20find%20the%20warlock%27s%20spirit%20there%20are%20five%20pushable%20bricks%20hidden%20in%20the%20walls.%20To%20unlock%20the%20spirit%2C%20push%20the%20third%20brick%20twice%2C%20then%20second%20brick%20five%20times%20and%20the%20fifth%20block%20once.
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