ROT13 Cipher

Apply the simple ROT13 letter substitution cipher to text. Free, secure, and works directly in your browser.

ROT13 Cipher

How to use ROT13 Cipher

  1. Type or paste your text into the input box.
  2. Click the 'Apply ROT13' button.
  3. The encoded (or decoded) text will appear below.
  4. Copy the result with a single click.

Features

  • Handles both uppercase and lowercase letters
  • Preserves numbers, symbols, and formatting
  • Processes text instantly in your browser
  • Works on any device with a web browser
  • Simple, clean interface with no installation needed

Who Is This Tool For?

The ROT13 Cipher is ideal for puzzle creators, learners studying basic cryptography, forum users who want to hide spoilers, and anyone needing a quick, reversible text obfuscation.

Why Use a ROT13 Cipher?

The ROT13 cipher is a fundamental tool in cryptography for obfuscating text by shifting letters 13 places in the alphabet, providing a simple, reversible method for hiding spoilers, creating puzzles, or introducing basic encryption concepts to learners in programming and cybersecurity.

Frequently Asked Questions

Is this ROT13 cipher tool free?

Are my texts uploaded to a server?

How do I use the ROT13 cipher?

What types of text can I encode?

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