Free, browser-based tools for learning and quick calculations. Nothing you enter leaves your browser.

🔑 Crypto Calculators

Caesar, monoalphabetic and row-transposition ciphers, Base64 and hex encoding, XOR, and RSA key generation, encryption and decryption. Every result shows its working step by step.

🧮 CRC-8 Calculator

Calculate CRC-8 checksums for integrity checking in protocols, firmware and embedded systems. How CRC-8 works.