Cipher tools
6 free cipher tools, all running in your browser.
Cipher
Atbash Cipher
Encode and decode text using the Atbash cipher.
Cipher
Caesar Cipher
Encrypt text with a custom Caesar shift cipher or decrypt unknown messages instantly.
Cipher
One-Time Pad Generator
Generate cryptographically random one-time pads and encrypt or decrypt messages with modular or XOR cipher modes entirely in your browser.
Cipher
Playfair Cipher Encrypt & Decrypt
Encrypt and decrypt text using the Playfair cipher with interactive 5x5 key square and visual step-by-step guide.
Cipher
ROT13 Encoder & Decoder
Encode and decode text with ROT13, ROT5, ROT18, ROT47, and custom shift ciphers.
Cipher
Vigenère Cipher
Encrypt and decrypt text using the Vigenère keyword cipher with advanced options like autokey, case control, and non‑letter preservation.