Password Strength Tester
Type a password to see how strong it really is. You get a score, an estimated crack time, a check-by-check breakdown and simple tips to improve it.
Strength score
0 / 100
Very Weak
Estimated crack time: —
Rough estimate for a brute force attack at 10 billion guesses per second. Use it to compare passwords, not as a guarantee.
Check by check
How to make it stronger
How to use
- Type or paste the password you want to test.
- Read the score, the crack time estimate and the check list.
- Apply the tips below the results and watch the score improve.
Note: Everything runs locally in your browser. Your password never leaves your device.
Tips
- Length matters most — a 16 character simple phrase beats an 8 character complex one.
- Avoid names, birthdays, keyboard walks like "qwerty" and common substitutions like "@" for "a".
- Use a different password for every important account, ideally with a password manager.