XOR Calculator
XOR two values byte-for-byte, live as you type, in text or hex.
XORs byte-for-byte, cycling the shorter value if the two inputs differ in length (a repeating-key XOR, the same technique behind simple stream ciphers — not secure encryption on its own). Result is always shown as hex regardless of input format. Runs entirely in your browser.
What is XOR Calculator?
XORs two values byte-for-byte, cycling the shorter one if the inputs differ in length — the same repeating-key technique behind simple stream ciphers (not secure encryption on its own, but a common building block and a useful thing to compute directly when working with binary data or a CTF challenge).
FAQ
Always as hex, regardless of whether your inputs were text or hex — hex is the most common way to represent arbitrary XOR output, including bytes that aren't printable text.
On its own, no — a repeating-key XOR is trivially breakable with basic cryptanalysis if the key is shorter than the message. It's a useful primitive, not a substitute for real encryption.