Password Strength Checker
See whether a password would survive a real attack. The checker spots dictionary words, names, keyboard patterns and predictable substitutions.
Runs in your browser. Nothing is uploaded Free, no sign-up Works on mobile
Password to testChecked on your device only. Nothing is sent or stored.
Loading the password dictionary…
Strength is estimated with zxcvbn, which detects dictionary words, names, keyboard patterns like “qwerty”, dates and common substitutions such as “p@ssw0rd”. Length matters more than symbols.
How to use Password Strength Checker
- Type a password. It is checked on your device only.
- Read the strength score and estimated crack time.
- Follow the suggestions to strengthen it.
Frequently asked questions
Is it safe to type my password here?
The check runs entirely in your browser and nothing is sent. Still, consider testing a similar password rather than your real one.
Why is “P@ssw0rd123” rated weak?
Attackers try common words with predictable substitutions and numbers first, so these patterns add little strength.
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