UtilityDeveloper

ROT13 Encoder / Decoder

Apply the reversible ROT13 substitution to English letters.

Instant · no account

Input

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Text

Method

How it works

Change any input above and the result updates instantly. The formula or method used by this tool is shown below.

Each A–Z/a–z letter is rotated by 13 positions

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Quick answers

About this tool

What does the ROT13 Encoder / Decoder do?+

Apply the reversible ROT13 substitution to English letters.

How does this utility calculate the result?+

It uses this method: Each A–Z/a–z letter is rotated by 13 positions

Are my inputs saved or sent to an account?+

Core CalcForge tools require no account, and most calculations run locally in your browser. Favorites and recent-tool history, when used, stay in this browser.