Cipher

Secure, private messaging that never leaves your device

Private & secure: All encryption and decryption happens locally in your browser. Nothing is ever sent to any server.
Encrypt
Decrypt
About
Encryption Settings Strong Encryption
AES-256
Military-grade encryption standard
XOR Cipher
Simple but effective encryption
Caesar Cipher
Classic substitution cipher

Choose a strong, unique password that you can share securely with the recipient

Decryption Settings Strong Decryption
AES-256
Military-grade encryption standard
XOR Cipher
Simple but effective encryption
Caesar Cipher
Classic substitution cipher

You need the same password that was used to encrypt the message

About This Tool

This encryption tool is designed to provide secure, private communication by allowing you to encrypt and decrypt messages without sending your data to any server. All operations are performed entirely within your browser.

Here are some key features:

  • Complete privacy - no data ever leaves your device
  • Multiple encryption algorithms to choose from
  • AES-256 encryption for maximum security
  • Intuitive, modern interface
  • Mobile-friendly design
  • No account or login required

To use the tool, simply choose an encryption method, enter a password, type your message, and click the encrypt button. Share the encrypted text and password with your recipient through separate, secure channels.

Security Information

This tool uses the following encryption methods:

  • AES-256: Advanced Encryption Standard with 256-bit key size, considered unbreakable with current technology.
  • XOR Cipher: A simple symmetric encryption algorithm that uses the exclusive-or operation.
  • Caesar Cipher: A classic substitution cipher where each letter is shifted by a fixed number of positions.

For maximum security, we recommend using AES-256 with a strong, unique password. Share the password through a different channel than the encrypted message.

Security Notice: While this tool uses strong encryption, your communication is only as secure as your password and the channels you use to share it. Always use secure methods to share your passwords.
All data stays on your device

Cipher - Secure Messaging Tool © 2025 • View Source

Disclaimer: This tool is provided "as is" without warranty of any kind. While we use industry-standard encryption methods, we cannot guarantee absolute security. Use at your own risk and always follow best practices for sharing sensitive information.