FREE · GENERATORS & RANDOMIZERS
Caesar Cipher and ROT13.
Shift Latin letters by a chosen amount to encode or decode a classical cipher.
How to use Caesar Cipher and ROT13
Enter the requested data or choose your settings, generate the result and review it before copying or downloading.
How it works
Shift Latin letters by a chosen amount to encode or decode a classical cipher. For learning only. Classical substitution provides no modern confidentiality.
Example
ABC at shift 13 → NOP
Questions about Caesar Cipher and ROT13
Is Caesar Cipher and ROT13 free, and do I need an account?
Yes. This tool is free to use in your browser without an account. Processing takes place on your device.
What are the limits and what should I check?
For learning only. Classical substitution provides no modern confidentiality. Review the result before using it in your work.
Is my input sent to a server?
Your input is processed in your browser and is not uploaded by this tool. Files and pasted text are cleared when the page is refreshed. Normal website requests are still required to load the page and its libraries. Read the privacy explanation.