All Tools VerseROT13 Encoder and Decoder
Encode or decode text with the ROT13 cipher, which shifts each letter 13 places.
- Runs in your browser
- Nothing uploaded
- Free, no sign-up
Processed locally in your browser. Your text never leaves this tab.
How to Use ROT13 Encoder and Decoder
- Paste your text. Any letters you want to shift.
- Apply ROT13. Each letter moves 13 places along the alphabet, wrapping around at the ends.
- Decode by applying again. Running ROT13 on the result returns the original text, since 13 is half of 26.
- Copy the result. Click Copy result. It all runs in your browser.
Frequently Asked Questions
How do I decode ROT13?
Apply ROT13 a second time. Because each letter shifts 13 places and the alphabet has 26, two shifts bring every letter back to where it started.
Is ROT13 secure?
No. It is a simple letter shift meant for hiding spoilers or puzzle answers, not for protecting sensitive information.
What happens to numbers and symbols?
Only letters are shifted. Numbers, spaces, and punctuation pass through unchanged.
Does it keep upper and lower case?
Yes. Capital letters stay capital and lowercase stay lowercase after the shift.
Is my text uploaded?
No. The cipher runs in your browser and your text never leaves the tab.
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