ROT13 String
Encode or decode a string with ROT13, shifting each letter 13 places in the alphabet.
FreeNo uploadNo sign-up
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How to use the ROT13 String
- Type or paste your input into the Input box, or upload a text file.
- Adjust the options under the tool. The result updates as you type.
- Copy the output or download it as a file.
Private by design
The ROT13 String runs entirely in your web browser. Nothing you enter or open here is uploaded to a server, so it is safe to use with private data and works even when your connection drops after the page has loaded.
Frequently asked questions
Is the ROT13 String free?
Yes. The ROT13 String on Codegres.org is completely free, with no sign-up, no limits and no watermark.
Is my string uploaded anywhere?
No. The ROT13 String runs entirely in your browser using JavaScript, so your string never leaves your device and is not stored or seen by anyone.
Does the ROT13 String work on my phone?
Yes. It works in any modern browser on Android, iPhone, Windows, Mac and Linux, with nothing to install.