ROT13/ROT47 Cipher
Encode or decode text using ROT13 (letter rotation) or ROT47 (full ASCII rotation) ciphers. Instant two-way encryption.
About the ROT13/ROT47 Cipher
Apply ROT13 to English letters, leaving other characters unchanged. Applying the same operation twice restores the original text. ROT13 is a simple reversible substitution and provides no meaningful security.
Features
- Symmetric ROT13 conversion
- Preserves nonletter characters
- Instant output
How to use this tool
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
How does this tool work?
Apply ROT13 to English letters, leaving other characters unchanged. Applying the same operation twice restores the original text. ROT13 is a simple reversible substitution and provides no meaningful security.
Using the results
Use the ROT13/ROT47 Cipher to transform supported text or data formats in your browser. Review the output before replacing your original, since some conversions change formatting or discard information.