Everything runs locally in your browser — nothing you type here is sent anywhere.
Estimates entropy and a rough offline cracking-time range. This is educational — it never leaves your browser.
Generates MD5, SHA-1, SHA-256, and SHA-512 digests of any text you enter.
Shift letters by a fixed amount — one of the oldest encryption techniques, now purely educational.
Base64 is an encoding, not encryption — anyone can decode it. It's used to safely transmit binary data as text.
Runs quick heuristic checks on a URL — this is a teaching tool, not a substitute for real threat intelligence.