๐ Caesar Cipher
Khoor, Zruog!
Try out the Caesar cipher, an ancient Roman encryption technique that shifts each letter of the alphabet by a fixed number of positions. Uppercase and lowercase are preserved, and non-alphabetic characters (numbers, symbols, non-Latin text) pass through unchanged. Useful as a teaching tool for how ciphers work, or just for fun with text.
How to use
- Choose "Encode" or "Decode" mode.
- Enter the text you want to convert.
- Adjust the shift amount with the slider โ the converted result is shown automatically.
FAQ
How secure is the Caesar cipher?
By modern standards, not secure at all โ there are only 25 possible shifts, so it can be broken instantly by brute force. It's purely a teaching tool for understanding the history and mechanics of ciphers.
Does this work with non-English text?
Non-Latin characters (like Japanese kana or kanji) aren't letters of the alphabet, so they pass through unshifted โ only the Latin letters get encoded.
How do I decode a message?
Switch to "Decode" mode and enter the same shift amount that was used to encode it โ that restores the original text.