Password Crack Time Calculator
See how long a brute-force attack would take to guess your password.
This never leaves your browser — not to TrueMeasureKit, not to any analytics, not anywhere. There's no server in this calculation at all, the same way there's none for the Password Generator.
For informational and educational purposes only — not professional or technical advice, and not a substitute for consulting a qualified professional about your specific situation. TrueMeasureKit is not liable for decisions made based on these results. See our Terms of Service.
What this estimate does and doesn't capture
This is a brute-force estimate: it assumes an attacker has to try random combinations across the full character set your password uses, and calculates the average time to hit the right one at a given guessing speed. Real-world attacks are usually smarter — dictionary attacks, leaked-password lists, and rule-based mutations (swapping "a" for "@", appending "123") crack predictable "complex-looking" passwords far faster than raw brute force suggests. Length is the single biggest factor in brute-force resistance: each additional character multiplies the keyspace by the charset size, while adding a symbol only multiplies it by roughly 1.3×.
Frequently asked questions
What assumptions does this crack-time estimate make?
It assumes a brute-force attack (trying every possible combination) at an estimated guesses-per-second rate for modern hardware — real-world attacks often use smarter methods (dictionary attacks, known password lists) that can be much faster against weak or common passwords.
Why does adding one more character matter so much?
Because the total combination space grows exponentially with length, not linearly — each additional character multiplies the possible combinations by the size of the character set used, which is why length matters more than most other factors.