About ROT13 Cipher
The ROT13 Cipher at Online Tool Base is a classic substitution cipher that replaces a letter with the 13th letter after it in the alphabet. It is a special case of the Caesar cipher.
Why Use This Tool?
ROT13 is widely used in online forums (like Reddit) to hide spoilers or punchlines. Since the alphabet has 26 letters, applying ROT13 twice restores the original text. **onlinetoolbase.online** makes encoding/decoding instant.
Key Features
- Symmetric: Same button encodes and decodes.
- Preserves Case: Maintains upper/lowercase formatting.
- Instant: No page reloads required.
How to Use
- Enter Text.
- Click Rotate.
History
Used since the Usenet era for hiding jokes and plot twists.