BuildUtilities

ROT13 Encoder – Free Online Tool

Encode and decode text using the ROT13 substitution cipher.

✦ FreeNo SignupInstantEncodingBinary & Low-Level Encoding Guide
Uryyb Jbeyq

ROT13 is its own inverse, apply it twice to get the original text.

Example

Input

Hello World

Output

Uryyb Jbeyq

Each letter is shifted by 13 positions in the alphabet. Applying ROT13 again reverses it.

How to Use ROT13 Encoder

  1. 1

    Enter Text

    Type or paste text to encode/decode with ROT13.

  2. 2

    Apply

    ROT13 is self-reversing. Applying it twice returns the original text.

  3. 3

    Copy

    Copy the result.

Common Use Cases

  • ✦Hiding spoilers in forum posts
  • ✦Simple text obfuscation
  • ✦Learning about substitution ciphers

Embed This Tool

Add this tool to your website or blog with a simple iframe embed.

<div style="max-width:480px"><iframe src="https://buildutilities.com/embed/rot13-encoder?ref=embed" width="480" height="360" frameborder="0" style="border-radius:8px;border:1px solid #2a2e3a;width:100%"></iframe><p style="font:11px sans-serif;color:#888;margin:4px 0 0;text-align:right">Powered by <a href="https://buildutilities.com/rot13-encoder?ref=embed" target="_blank" rel="noopener">BuildUtilities</a></p></div>

Share

Share a link to this tool. Results can be passed via URL parameters.

https://buildutilities.com/share/rot13-encoder

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