Check your password strength privately in your browser. Clear checklist for lowercase/uppercase/numbers/symbols. Optional breach check.
Weak passwords are the #1 way hackers get in. Most online “strength checkers” either nag you with pointless rules or send your password to a server. Not here.
This password strength checker runs 100% locally in your browser. Nothing is stored, nothing is sent. You get a clear checklist for the basics — lowercase, uppercase, numbers, symbols — plus the option to see if your password has ever been leaked in a public data breach.
Try it now:
Password strength checker
Why use this tool?
- Privacy-first: no password leaves your device.
- Green checks for what’s strong, grey if missing.
- Modern standards: based on NIST guidance — focus on length & uniqueness, not silly complexity rules.
How to create stronger passwords
- Aim for 12–16+ characters.
- Use 3–4 character types (lower, upper, numbers, symbols).
- Prefer passphrases (random words) over short “complex” words.
- Never reuse a password across accounts.
- Pair with 2FA for critical accounts.
FAQ
Do you store my password?
No. Everything runs in your browser. If you enable the breach check, only a short hash prefix is shared, not the actual password.
What do the green checks mean?
Each line (lowercase, uppercase, numbers, symbols) lights up when your password includes that type.
Can I generate passwords here?
This tool checks passwords. A generator is coming soon.
If this helped you, share it with colleagues or friends. Want a corporate-branded version of this tool for employee awareness? Contact me.