ROT13 Encoder/Decoder - Free, Instant, In Your Browser
ROT13 shifts each letter 13 places through the alphabet - a simple, classic way to obscure text (not for real security).
How to use ROT13
- 1Paste your text or data into the input box above.
- 2ROT13 runs instantly, right in your browser.
- 3Copy the result or use it directly.
Your file is only processed temporarily for the conversion and is automatically deleted within 24 hours.
Frequently Asked Questions
Is ROT13 secure?
No - it is a simple substitution cipher meant for obscuring text (like spoiler text), not for real security or privacy.
How do I decode ROT13?
Run the same tool again on the encoded text - ROT13 is its own inverse.