Apply ROT13 to Latin letters; apply it again to restore the original text.
Type or paste on the left — the result updates as you type.
Only A–Z and a–z change. Numbers, punctuation and other scripts remain unchanged. ROT13 does not provide secrecy.
Up to 100,000 UTF-16 units per input and 1,000,000 per result. See the supported formats and examples below.
Tool page updated: 2026-09-27
