No. Caesar ciphers are trivially breakable and are for fun or obfuscation, not security.

ROT13 / Caesar Cipher

Shift letters by a configurable offset (default 13).

What this tool does

Apply a Caesar cipher with any shift from 1 to 25. ROT13 (shift 13) is the classic default. Encode and decode by adjusting the shift. Non-letter characters pass through unchanged.

Input text

Shift (1–25)

Non-letter characters pass through unchanged. To decode, apply 26 minus the original shift.

Example input/output

Illustrative sample — your real inputs may look different.

Example input

Hello, World! (shift 13)

Example output

Uryyb, Jbeyq!

How to use

Type or paste text in the input box.
Set the shift value (default 13 for ROT13).
Copy the shifted output. To decode, apply 26 minus the original shift.

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