Password Strength Checker

Type a password and its strength is rated in real time, with an estimated time-to-crack and specific advice — longer length, more character variety, avoiding common patterns — for making it stronger. Everything is evaluated locally in your browser; the password is never transmitted anywhere. Use it to sanity-check a new password before you commit it to an account.

• Real-time strength rating
• Estimated crack time
• Character-variety and pattern checks
• Concrete improvement advice
• Fully local — nothing leaves your browser

• Checking a new password before using it
• Demonstrating why longer passwords matter
• Auditing your password habits
• Teaching password hygiene