ROT13/ROT47 Cipher
Encode or decode text using ROT13 (letter rotation) or ROT47 (full ASCII rotation) ciphers. Instant two-way encryption.
About This Free Online ROT13/ROT47 Cipher
Our free online ROT13/ROT47 cipher tool rotates letters in your text to encode or decode messages. ROT13 shifts letters by 13 positions (A→N, B→O, etc.) and reversing it applies the same shift — so encoding and decoding are identical. ROT47 shifts all printable ASCII characters by 47 positions for stronger obfuscation. Both are classic Caesar-style ciphers used for spoilers, puzzles, and basic text obfuscation.
Features of Our ROT13/ROT47 Cipher
- ROT13 mode — rotates letters A-Z by 13 positions (reversible)
- ROT47 mode — rotates all printable ASCII by 47 positions
- Type text to encode, paste encoded text to decode
- Auto-detection in ROT13 mode
- Copy encoded/decoded text to clipboard
- 100% private — browser-only processing
How to Use the ROT13/ROT47 Cipher
The ROT13/ROT47 Cipher works right in your browser — no signup, no installation. Follow these steps:
- Type or paste your text into the input area.
- Select ROT13 or ROT47 mode.
- The encoded/decoded text appears instantly below.
- Paste the result back to reverse the transformation.
Frequently Asked Questions About ROT13/ROT47 Cipher
What is ROT13?
ROT13 ("rotate by 13 places") is a Caesar cipher that shifts each letter by 13 positions. Since the alphabet has 26 letters, applying ROT13 twice returns the original text. It is commonly used to hide spoilers, puzzle answers, and offensive text.
What is the difference between ROT13 and ROT47?
ROT13 only rotates letters A-Z (ignoring numbers, punctuation, and spaces). ROT47 rotates all printable ASCII characters from 33 to 126, making it more thorough for obfuscating text that includes numbers and symbols.
Is this secure encryption?
No. ROT13 and ROT47 are simple ciphers that provide no real security. They are used for basic obfuscation (like hiding spoilers) and educational purposes, not for protecting sensitive data.
Why Choose the ROT13/ROT47 Cipher?
Converting data should be quick and lossless. The ROT13/ROT47 Cipher transforms your input the instant you paste it, handles edge cases cleanly, and does all the work in your browser — so there is no upload, no waiting, and no copy of your data on a server somewhere.