ROT13 Encoder/Decoder — Free Online Tool
Use ROT13 Encoder/Decoder free online — runs entirely in your browser, no data sent to servers. No sign-up required.
Input
ROT13 Output
- ROT13: shifts each letter by 13 positions. Numbers and symbols are unchanged.
- ROT47: shifts all printable ASCII characters (! to ~) by 47 positions.
- Both ciphers are symmetric — apply the same operation twice to get the original text back.
Frequently Asked Questions about ROT13 Encoder/Decoder
- Is ROT13 Encoder/Decoder completely free to use?
- Yes, ROT13 Encoder/Decoder is 100% free with no sign-up, no watermarks, and no usage limits.
- Is my data private?
- ROT13 Encoder/Decoder runs entirely in your browser — no data is ever sent to our servers. Your content stays on your device.
- Does it work offline?
- Once the page has loaded, ROT13 Encoder/Decoder works fully offline in your browser — no internet connection is required.
- Is the encoding/decoding fully reversible?
- Yes, all encoding operations are fully reversible. Use the same tool or a corresponding decoder to reverse the operation.
- Does ROT13 Encoder/Decoder work on mobile and tablet?
- Yes, ROT13 Encoder/Decoder is fully responsive and works in all modern browsers on desktop, tablet, and mobile.
This tool runs entirely in your browser. No data is ever sent to our servers.