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.
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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.