ROT13 / ROT47 Cipher
NewEncode and decode text using the ROT13 and ROT47 substitution ciphers.
ROT13 and ROT47 are self-inverse substitution ciphers, so applying the same transform twice returns the original text.
Frequently Asked Questions
When should I use ROT13 vs ROT47?
Use ROT13 if you only want to rotate A-Z and a-z. Use ROT47 if you also want numbers, punctuation, and other printable ASCII characters from 33 to 126 to rotate.
Why are emojis or accented characters unchanged in ROT47?
Because ROT47 in this tool only transforms printable ASCII. Anything outside that 33-126 range is left exactly as-is.
Do I need a separate decode mode?
No. Both ROT13 and ROT47 are self-inverse, so applying the same transform again returns the original text. The tool's single transform logic handles both directions.
Is it live, or do I have to click Transform?
It's both. The output updates automatically after a short 250 ms pause while you type, and the Transform button just forces the same conversion immediately.
What does 'Swap input/output' actually do?
It takes the current output, puts it back into the input box, and reruns the active transform. That's handy for quick round-trips or chaining tests without manual copy/paste.