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Text Cipher

Encode or decode text using classic ciphers. Runs entirely in your browser.

Shifts each letter N positions in the alphabet. Used by Julius Caesar.
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🔒 All encryption is performed client-side. No text is sent to any server.

Frequently asked questions

AES-256-GCM encryption: 1) you provide plain text + password, 2) browser generates 256-bit key from password (PBKDF2, 100K iterations), 3) text encrypted with random IV, 4) output base64 ciphertext. Decryption needs same password.