🔁 ROT13 Cipher

The ROT13 Cipher encode and decode text with rot13. It runs entirely in your browser — nothing is sent to a server.

Steps

1. Paste or type your text in the Input box above.
2. Click Run ROT13 Cipher (or use the Load sample button to try it first).
3. Copy the result with one click.

Tips

• Your text stays on your device. We never upload or store it.
• The tool works offline once the page has loaded.
• Need to do this often? Bookmark this page and come back anytime.

About the ROT13 Cipher

Apply the ROT13 substitution cipher to any text. ROT13 is its own inverse, so the same operation encodes and decodes.