ROT13 Encoder
ROT13은 자기 역함수입니다. 같은 함수를 두 번 적용하면 원본이 됩니다.
Last updated: 2026 · Free online tool
What is ROT13 Encoder?
Free online ROT13 encoder
How to Use
- 1 Enter Input — Enter the text you want to encode/decode.
- 2 View Result — Check the ROT13-encoded result.
- 3 Copy — Copy the result to use it.
Frequently Asked Questions
ROT13 is a simple letter substitution cipher that replaces each letter with the letter 13 positions after it in the alphabet. Applying it twice returns the original text.
Yes, it is completely free.
No. All processing is done in the browser.
Yes, it is responsive and works on mobile devices.
Yes, it is based on static data and can be used offline.