Caesar Cipher
Shifts each letter by N positions in the alphabet. Classic substitution cipher used by Julius Caesar.
COPY
Vigenère Cipher
Polyalphabetic cipher using a keyword. Each letter is shifted by the corresponding key letter's position.
COPY
AES-256-GCM Encryption
Military-grade symmetric encryption using Web Crypto API. AES-256-GCM provides authenticated encryption with 256-bit keys derived via PBKDF2.
COPY
Base64 Encoding
Encodes binary data as ASCII text. Not encryption — just encoding for safe text transport.
COPY
ROT13
Special case of Caesar cipher with shift=13. Applying ROT13 twice returns the original text. Self-inverse.
COPY
XOR Cipher
Bitwise XOR each byte with a repeating key. Self-inverse: apply twice with same key to get original. Output in hex.
COPY