ROT13 / ROT47
Rotate text with ROT13, ROT47, ROT5 (digits) or ROT18. The same step encodes and decodes. Free and private.
This is not secure encryption: anyone can break it. Use AES encryption for real secrets.
Shortcuts: Ctrl+Enter run · Ctrl+Shift+C copy result · / search (use ⌘ on Mac)
Next steps
Done here? Use the Send to… menu on the result to carry it on to Caesar Cipher.
Free ROT13 / ROT47
ROT13 turns A into N and N back into A, so doing it twice gives the original. It is used to hide spoilers and puzzle answers. It gives developers a quick browser-based way to solve a focused rot13 / rot47 task before moving the result into a project.
How to use ROT13 / ROT47
Choose a variant and type your text. To decode, paste the rotated text and use the same variant.
Common mistakes
- Using ROT13 to hide secrets: it offers no protection.
- Expecting ROT13 to change digits: use ROT18 for that.
Frequently asked questions
What is ROT13?
A Caesar cipher with a shift of 13. Because the alphabet has 26 letters, applying it twice returns the original text.
What is the difference between ROT13 and ROT47?
ROT47 rotates all 94 printable ASCII characters (from ! to ~) by 47, so digits and punctuation change too.
What are ROT5 and ROT18?
ROT5 rotates digits by 5. ROT18 is ROT13 for letters together with ROT5 for digits.
Is anything uploaded?
No. The calculation runs in your browser and nothing you enter is sent to a server.
How do I use this rot13 / rot47 tool?
Use the interactive controls above; processing stays in your browser and the result is intended as a practical starting point for development work.
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