01 / Strength fundamentals
What a strength score can—and cannot—tell you
Understand length, character variety, and the limits of local password estimates.
Understand strengthLocal analysis. Clear answers.
Better passwords.
Less guesswork.
Know what makes your password stronger—without sending it anywhere. SecureCheck gives you immediate, practical feedback, right in your browser.
No sign-upNo password storageNo network checks
Understand the analysis
SecureCheck
Your private password check
Enter a password to begin. Analysis stays on this page. Limit: 1,024 UTF-16 code units.
/ 100
- Characters
- Check type
- Local heuristic
Requirement checklist
This is a guidance score, not a crack-time estimate or a breach lookup. A reused password is unsafe even with a high score.
No entered password is saved or transmitted by this tool.
The security field guide
Build habits that hold up.
Five focused guides. Practical decisions. No scare tactics.
02 / Predictability
Spot the patterns attackers expect
Recognize repetition, keyboard sequences, common words, and predictable substitutions.
Explore common patterns03 / Secure generation
Let randomness do the hard work
Learn how browser-based generation works and how to handle a new password safely.
Learn about generation04 / Everyday storage
Choose a password manager with confidence
Compare storage models, recovery options, portability, and everyday usability.
Choose your approach05 / Defense in depth
Protect more than the password
Make sense of passkeys, multifactor authentication, recovery codes, and phishing.
Strengthen your accountsDesigned to stay local
Your password is not our data.
The checker runs in your browser. It does not contact a breach database, record what you type, or send password contents to a server. Only your cookie preference is saved on this device.
A compromised device, browser extension, or clipboard can still expose a secret. Use this checker for guidance—not as a substitute for unique credentials and multifactor protection.
Read our privacy approach