XOR Cipher
Online XOR cipher tool: XOR the text with a key that cycles through its bytes and output the result as text, hexadecimal or Base64, with reversible decryption—great for simple encryption and CTF practice.
Output format
XORs each UTF-8 byte with the key, byte by byte. The operation is reversible: run it again with the same key to restore the original. Processed only on your machine.