ROT13 Encoder — Free Online ROT13 Cipher Encode & Decode

Cách dùng

1. 1 Paste text into the input.
2. 2 Output updates instantly — ROT13 is its own inverse.
3. 3 Copy the result.

Vì sao dùng công cụ này

• ROT13 = Caesar cipher with a fixed shift of 13.
• Symmetric — applying it twice returns the original.
• Used on Usenet, forums, puzzle games — hides spoilers without serious encryption.
• Preserves case, digits, punctuation, whitespace.

Câu hỏi thường gặp

ROT13 Encoder là gì?

A ROT13 Encoder is a tool that applies the classic ROT13 substitution cipher, shifting each alphabetic letter by 13 positions in the alphabet. Because 13 is half of 26, the same operation both encodes and decodes text, so applying it twice restores the original. The transformation runs entirely in the browser, processing the input client-side without uploading it to a server.

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