Type a password below to get a realistic crack-time estimate — based on real brute-force math, not a marketing gauge.
Nothing you type into the password field is stored, logged, or sent anywhere. This tool runs entirely in your browser. You can disconnect from the internet after the page loads and it will keep working — proof that nothing is being transmitted. No accounts, no cookies, no analytics tracking what you type.
This tool calculates your password's entropy — a measure of how many possible combinations an attacker would need to try — based on the character types you use and the length of your password. It then estimates how long a brute-force attack would take against a realistic modern offline cracking setup (roughly 10 billion guesses per second, in line with current high-end GPU cracking rigs).
This is an estimate, not a guarantee. Real-world cracking speed varies by hardware, and passwords that appear in known data breach lists can be cracked almost instantly regardless of their theoretical entropy, because attackers try known-leaked passwords first.
Yes. This calculator runs entirely in your browser using JavaScript — your password is never sent to a server, logged, or stored anywhere. You can disconnect your internet after the page loads and the tool will still work, which proves nothing is being transmitted.
Length matters more than complexity. A 16-character passphrase of random unrelated words is typically stronger and easier to remember than an 8-character password crammed with symbols. Aim for at least 12–16 characters, mix character types, and avoid dictionary words, personal information, or patterns like "123" or "qwerty".
Yes — a password manager lets you use a unique, high-entropy password for every account without needing to remember each one, which is significantly more secure than reusing or slightly varying the same password across sites.