Developer tool
Caesar Cipher
Encrypt and decrypt text using a configurable Caesar shift directly in your browser.
Processed in your browser unless a tool explicitly says otherwise.
Use the toolNo account required
Only English A-Z and a-z letters shift. Numbers, punctuation, whitespace and Unicode characters stay unchanged.
Any whole number is accepted and normalized modulo 26.
Alphabet preview
Original
ABCDEFGHIJKLMNOPQRSTUVWXYZShifted
DEFGHIJKLMNOPQRSTUVWXYZABCLowercase
defghijklmnopqrstuvwxyzabcROT13 is a Caesar cipher with a shift of 13. Caesar Cipher is a classical substitution cipher and is not suitable for protecting sensitive or confidential data. All processing happens locally in your browser.
How it works
A focused workflow for a focused task.
Enter the information the tool asks for, review the result, and use the output for your next step. Zobnu keeps browser-first utilities straightforward and transparent.
Privacy note
Your inputs stay in this browser unless the tool clearly indicates that an external provider is required.