Is ROT13 Encoder/Decoder safe to use? Are my files uploaded to a server?

Yes, ROT13 Encoder/Decoder is completely safe to use. This tool processes everything directly in your browser using client-side technology. Your data never leaves your device -- nothing is uploaded to any server. This ensures complete privacy and security for all your files and data.

Can I use ROT13 Encoder/Decoder for large documents?

Yes, ROT13 Encoder/Decoder handles text of any length. Whether you are working with a short paragraph or a lengthy document, the tool processes your text instantly in your browser with no size limitations.

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ROT13 Encoder/Decoder

ROT13 and Caesar cipher encoder/decoder

Shift: 13 (ROT13)

125

Input Text

Encoded (shift +13)

Decoded (shift -13)

About Caesar Cipher / ROT13

ROT13 is a special case of the Caesar cipher with a shift of 13. Since the English alphabet has 26 letters, applying ROT13 twice returns the original text. Only letters are shifted; numbers, spaces, and symbols remain unchanged.