ROT13
Apply ROT13 cipher
Input Text
Paste or type your text here
Output Text
Processed text will appear here
How It Works
Apply ROT13 cipher
Apply the ROT13 substitution cipher that shifts each letter 13 positions in the alphabet. Since there are 26 letters, applying ROT13 twice returns the original text — so the same tool both encodes and decodes. Commonly used to obscure spoilers, puzzle answers, and mildly sensitive text.
Key Features
- ✓ROT13 encode and decode in one tool
- ✓Shifts A-Z and a-z by 13 positions
- ✓Numbers and symbols remain unchanged
- ✓Applying twice restores original text
How to ROT13 Encoder/Decoder
- 1
Enter text
Type or paste text to encode/decode.
- 2
ROT13 is applied
Each letter shifts by 13 positions.
- 3
Copy result
Click copy for the transformed text.
Common Use Cases
- •Hiding spoilers in forums and social media
- •Simple text obfuscation for puzzles
- •Encoding easter eggs in content
- •Decoding ROT13 text found online
Frequently Asked Questions
Is ROT13 secure?▼
No. ROT13 is not encryption and provides no security. It's a simple substitution cipher meant for casual obfuscation only.
How do I decode ROT13?▼
Apply ROT13 again. Since the alphabet has 26 letters, shifting by 13 twice returns to the original position.