Text & encoding

ROT13 Encoder / Decoder

Apply the ROT13 substitution cipher to text. Nothing you enter leaves your browser.

Enter text

Result

Your result will appear here.

Simple by design

Get the answer, without the clutter.

FormatCalc is built for quick work. This rot13 encoder / decoder runs entirely on your device, so private text and data stay private.

01

Enter or paste your information.

02

Transform it with one click.

03

Copy, use, or download your result.

Common questions

Using the ROT13 Encoder / Decoder

Is the ROT13 Encoder / Decoder free to use?

Yes. FormatCalc's ROT13 Encoder / Decoder is free to use with no account required.

Is my data private when I use the ROT13 Encoder / Decoder?

Yes. This tool processes your input locally in your browser. FormatCalc does not upload or store what you enter.

How do I use the ROT13 Encoder / Decoder?

Paste or type your input, select any available options, and choose Apply ROT13. You can then copy the result.