ROT13, ROT47 & ROT-N Cipher
The self-inverse alphabet rotations.
About this tool
ROT13 shifts letters 13 places, making it its own inverse — apply it twice and you're back. It hides spoilers and puzzle answers, not secrets. ROT47 extends the idea across the printable ASCII range, and ROT-N lets you pick any shift.
Like everything on encrypt.tools, this runs entirely in your browser — nothing you enter is transmitted or stored.
Frequently asked questions about ROT13 / ROT47
Is ROT13 encryption?+
No — it's a fixed letter rotation with no key, used to hide spoilers or puzzle answers from casual view, not to secure anything.
Why is ROT13 its own inverse?+
The alphabet has 26 letters; rotating by 13 twice returns to the start. So the same operation encodes and decodes.
What is ROT47?+
A variant that rotates across 94 printable ASCII characters instead of just letters, so it also transforms digits and punctuation.