ROT13 Text

ROT13 Text Tool instantly applies the ROT13 cipher to any input text, shifting letters by 13 positions for basic encoding. Easily paste your text, view the encoded result live, and decode it back with a second pass. Useful for lightweight text obfuscation, puzzles, and casual cryptography tasks.

Paste your input above or import a file below.
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Supported file types: .txt

Feature Guide:

  • Same-page live updates (instant ROT13 transformation)
  • Automatically shifts letters by 13 positions (case-sensitive)
  • Supports file import (.txt) and export
  • Copy Output and Clear All buttons
  • Character counter for output text
  • Flash output border for visual feedback

How to Use:

  1. Paste or type your text into the input box.
  2. The tool automatically applies ROT13 transformation.
  3. Copy or export the encoded text easily.
  4. To decode, simply re-apply ROT13 to the output text.

Example:

Input Text:

Hello World!

ROT13 Output:

Uryyb Jbeyq!

(Re-applying ROT13 again returns you to Hello World!)

Common Use Cases:

ROT13 is often used for simple text obfuscation, casual encryption of spoilers or jokes, puzzle creation, and educational purposes. This tool makes it quick and easy to apply or reverse ROT13 without needing coding skills or manual letter shifting.

Useful Tools & Suggestions:

After running ROT13, ROT47 Text is a natural next step if you want a stronger or more complex shift great for light obfuscation. And if you’re doing pattern experiments or building puzzles, Replace Letters in Text lets you customize the transformation exactly how you want.