ROT13 Encoder/Decoder
Encode and decode text with the ROT13 substitution cipher online. Free ROT13 tool for simple text obfuscation and puzzle solving.
ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. Applying ROT13 twice returns the original text.
How to Use ROT13 Encoder/Decoder
Enter your data
Open ROT13 Encoder/Decoder and type or paste the data you want to process.
Choose the operation
Select the encoding format, hash algorithm, or conversion mode as needed.
Get instant results
The output is generated immediately as you type — no need to click a button.
Copy the output
Click the Copy button to copy the result to your clipboard for use elsewhere.
Frequently Asked Questions
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