Free Online Tool
ROT13/ROT47
Simple letter and character rotation ciphers for basic encoding.
How to Use ROT13/ROT47
- Type or paste your text into the input box.
- Pick ROT13 (rotates the 26 letters A–Z by 13) or ROT47 (rotates the 94 printable ASCII characters by 47).
- The result appears instantly — run the same rotation again to decode, since both ciphers are their own inverse.
- Use Copy to grab the output. All processing stays in your browser.
ROT13 only affects letters and leaves digits, spaces, and punctuation untouched, so it is popular for hiding spoilers. ROT47 also scrambles digits and symbols, giving a less readable result. Neither is secure encryption — treat them as reversible obfuscation, not protection.
Examples
ROT13 — input:
Hello World
Output:
Uryyb Jbeyq
ROT13 decode (same operation) — input:
Uryyb Jbeyq
Output:
Hello World
ROT47 — input:
Hello World
Output:
w6==@ (@C=5
ROT47 rotates digits and symbols too, so the output looks more scrambled. Applying ROT47 again returns the original text.
Features
Privacy Focused
All processing happens in your browser. No data is sent to servers.
Free Forever
No registration, no limits, completely free to use.