Password Strength Checker
Test your password strength and security. Get instant feedback, strength score, estimated time to crack, and personalized recommendations to improve your password security. All checks happen in your browser - your password never leaves your device.
Security Guide
Length is King
Aim for 16+ characters. Each character increases the cracking time exponentially. Length usually beats complexity.
Character Variety
Mixing uppercase, lowercase, numbers, and symbols significantly expands the character pool (entropy).
Uniqueness
Never reuse passwords across different sites. One breach shouldn't compromise your entire digital life.
Passphrases
Consider 4-5 random words like "Purple-Mountain-Sky-Cookie-7!". They're easy for you, but hard for bots.
Password Strength Reference
| Strength | Score | Crack Time Estimate |
|---|---|---|
| Very Weak | 0-20 | Instant / Seconds |
| Weak | 21-40 | Minutes / Hours |
| Fair | 41-60 | Days / Weeks |
| Good | 61-80 | Months / Years |
| Strong | 81-100 | Centuries+ |
Is my password safe here?
Yes. This tool is client-side. We use JavaScript in your browser to analyze the risk. No data is sent to our servers.
Why 12+ characters?
Modern hardware can try billions of guesses per second. 12 characters is the current baseline for reasonable security.