ROT13 Encoder/Decoder
Rotate every letter by 13 positions — the output updates automatically as you type.
Processed locally in your browser — nothing is sent to a server.
Input
1 lines13 charsValid
Output
1 lines13 charsValid
About this tool
Paste text and its ROT13 transform appears on the right automatically. Since ROT13 is self-inverse, pasting the output back in returns the original text.
Frequently asked questions
- What is ROT13?
- A Caesar cipher with a fixed 13-letter shift. Because the alphabet has 26 letters, applying ROT13 twice returns the original text — encoding and decoding are the same operation.
- Do I need to pick a mode?
- No — since ROT13 is self-inverse, there's just one live transform; run your output back through the tool to reverse it.
- Is my text sent to your servers?
- No. The transform runs entirely in your browser.
Privacy
Every transform runs in your browser. Nothing you paste here is sent to WebCodeIn’s servers, logged, or stored.
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