🧾 Caesar Cipher
Classic Caesar cipher shift encryption and decryption
✓ Runs entirely in your browser — your data never leaves this device
About This Tool
The classic Caesar cipher: shift letters by a custom offset (-25 to 25) to encrypt or decrypt. Non-Latin characters stay unchanged. Great for crypto beginners, CTF practice and puzzles.
How to Use
- Type the English text to encrypt or decrypt
- Set the shift (3 is the classic choice)
- Click Encrypt or Decrypt to get the result
FAQ
Is Caesar cipher secure?
Not at all — only 25 possible shifts, trivially brute-forced. Educational and recreational use only.
Is Chinese encrypted?
No. Only Latin letters shift; everything else is preserved.