ROT5 Encode & Decode
Shift only digits 0–9 by 5 (the number counterpart to ROT13). This tool does both encode and decode on one page — just pick a mode, paste your text, and click. Everything runs on your device, nothing is sent to a server.
Everything runs in your browser. Your data is never sent to our servers.
Example
Example Input
12345
Example Output
67890
How to Use
- 1Choose Encode or Decode mode at the top.
- 2Type or paste your text into the Input field.
- 3Click the button (or press Ctrl+Enter) to process. The result appears in the Output field.
- 4Click Copy to copy the result, or "Swap input/output" to quickly reverse the operation.
About ROT5
ROT5 shifts only digit characters (0–9) by 5: 0↔5, 1↔6, and so on. Like ROT13 for letters, applying ROT5 twice returns the original digits.
How it works: each digit is increased by 5 modulo 10; letters and symbols are left untouched. Encode and decode are identical because 5 is half of 10.
ROT5 is usually combined with ROT13 (becoming ROT18) to obscure text containing both letters and numbers. It is not for security.
FAQ
Can this ROT5 tool both encode and decode?
Yes. This is a single page with a toggle — use Encode mode to transform text, and Decode mode to reverse it. No need for two separate pages.
Is my data sent to a server?
No. ROT5 is processed entirely in your browser. The text you enter never leaves your device.