Affine Cipher Encoder - Free, Instant, In Your Browser
Enter text and keys A and B (A must be coprime with 26) to encode it with the affine cipher.
How to use Affine Cipher Encode
- 1Enter the required date(s) and details above.
- 2Click Calculate - Affine Cipher Encode runs instantly, right in your browser.
- 3Read your result below.
Your file is processed in your browser and is never uploaded.
Frequently Asked Questions
What's the formula?
Each letter x is mapped to (A × x + B) mod 26, keeping non-letter characters unchanged.
Is my data sent to a server?
No - everything runs entirely in your browser with JavaScript. Nothing is uploaded.