ROT18
Apply ROT13 to letters and ROT5 to digits.
Codes
Compare common ROT18 (ROT13 for letters + ROT5 for digits) with a distinct variant that applies a separate shift of 18 to letters and digits.
Variant
Mappings
Alphabet / digitsROT18 (ROT5 + ROT13)
ResultN-ZA-M and 5-90-4
Shift 18S-ZA-R and 8-90-7
Source text
Result
Quick explanation
Enter source text, then choose “ROT18 (ROT5 + ROT13)” or “Shift 18”. The first matches the common usage of ROT18. The second is a distinct variant: letters move by 18 positions and digits by 18 modulo 10, which is 8.
Try this too
Need a more complete tool?
Use the general ROT tool to switch quickly between ROT5, ROT13, ROT18, the Shift 18 variant and ROT47.
Additional information
Understand ROT18
ROT18 commonly refers to ROT13 for letters combined with ROT5 for digits. This page also offers, separately, a variant that applies a shift of 18 positions to letters and digits.
ROT18: ROT5 + ROT13
In common usage, ROT18 combines ROT13 for letters and ROT5 for digits. Applying the same mode a second time restores the original text.
Variant: Shift 18
This variant shifts letters separately by 18 positions. For digits, 18 modulo 10 is 8, so each digit moves by 8 positions. It is presented as a distinct variant rather than as the standard ROT18 definition.
Related tools
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