Free Online Tool
Autokey Cipher
Self-synchronizing stream cipher that uses the message itself as part of the key.
How to Use Autokey Cipher
- Enter or paste your text in the input field
- Select your desired options (if available)
- Click the encode/decode button or watch real-time conversion
- Copy the result using the copy button
Examples
Input:
Hello World
Output:
Features
Privacy Focused
All processing happens in your browser. No data is sent to servers.
Free Forever
No registration, no limits, completely free to use.