Toolkit / Privacy & Security Tools
Password Strength Checker
Estimate password strength and see common warnings such as short length, repeated characters, or predictable patterns.
Privacy note: Security-sensitive tools are designed for local browser use, but you should only handle secrets on a device and browser profile you trust.
Limitations: Strength estimates are guidance and cannot prove a password is safe.
Password Strength Checker
Estimate password strength locally in your browser.
Strength
Very strong
158 estimated entropy bits
Good mix. Avoid reusing this password elsewhere.
Passwords are evaluated in memory in this browser. Do not paste passwords you are not comfortable viewing on this device.
How password strength checker works
Enter a password and Toolkit estimates its strength based on length, variety, and simple pattern checks.
Use the feedback to improve a password before saving it in your password manager.
Privacy
Security-sensitive tools are designed for local browser use, but you should only handle secrets on a device and browser profile you trust.
Limitations
- Strength estimates are guidance and cannot prove a password is safe.
- This tool does not check every breach database or attacker strategy.
- Do not test real passwords on a device, browser, or screen you do not trust.
FAQs
What makes a password strong?
A strong password is long, unique, hard to guess, and not reused on other accounts.
Is a strength checker perfect?
No. It gives useful signals but cannot model every attack or know every leaked password.
Should I paste my real password?
Only do that on a device and browser profile you trust. Safer still, test a similar pattern instead.
Are passphrases good?
Long, unique passphrases can be strong, especially when stored in a password manager.