Vigenere Cipher Trainer

Artificial Apps & Games

About this app

Learn the classic Vigenere cipher with Vigenere Cipher Trainer — a hands-on tool to encrypt, decrypt, and practice polyalphabetic ciphers.

Whether you are studying classical cryptography, preparing for a security course, or simply curious about historical ciphers, this app helps you understand how the Vigenere cipher works, step by step.

KEY FEATURES
• Encrypt and Decrypt: enter your message and keyword to see the Vigenere cipher in action
• Training Modes: build your skills with Letter Shifts, Decode Words, and Speed Round challenges
• Vigenere Table: explore the full tabula recta reference used for encryption and decryption
• Dark and Light Mode: comfortable viewing day or night

PRIVACY FIRST
• Works fully offline — your text never leaves your device
• No account required
• No analytics, no tracking

Please note: the Vigenere cipher is a classical/historical cipher and is not modern encryption. Do not use it to protect sensitive information.

What’s new

Updated to target Android 16 (API 36).